Many of us have encountered such a problem as turning on the engine icon (Check engine...), the appearance of which frightens car drivers. We offer you the 5 most common reasons why the check engine light comes on on the dashboard.
The engine warning light usually appears without warning. The reason for the appearance of the Check engine cannot be immediately understood. Even if the car has auto diagnostics (for example, in cars such as ,), which scans all car systems for errors and, if any, displays a decryption on the information panel, the reasons for the appearance of the check engine light will not be decrypted.
For most drivers, the appearance of this warning icon on the dashboard means the need to urgently go to an auto repair shop to diagnose and eliminate the reason why the “Check Engine” warning sign appeared. But in fact, in most cases, when the “Check” indication appears, it is possible, and in some cases, perhaps, to eliminate the cause yourself without a trip to a car service center, which will save you money.
Daewoo Matiz CHEK caught fire: causes and their elimination
A modern car is crammed with electronics.
Multiple gauges and warning lights on the instrument panel indicate different faults. This progress has not spared Daewoo Matiz either. The most well-known signal is the “CHECK” function lighting up. This is an indication that there are problems with the operation of the engine or control unit. Video
The video material will tell you what to do when the check engine light comes on, and also indicate the reasons and solutions.
Replacing spark plugs and high-voltage wires
Spark plugs in a car are the main components for igniting the fuel mixture. If the spark plugs are faulty, the spark will not be supplied correctly to ignite the gasoline mixture. Faulty spark plugs often result in a lack of spark or an incorrect spark interval, which results in the engine not running properly. If the spark plugs do not work properly during acceleration, especially from a standstill, you may feel slight jolts.
What are the reasons for spark plug failure:
Most spark plugs in pre-1996 vehicles need to be replaced every 25,000 to 30,000 kilometers. In newer cars, spark plugs last more than 150,000 km. However, these scheduled spark plug replacement intervals may be reduced by various factors related to fuel quality and driving style.
What to do:
If your spark plugs have not been changed for a long time, or you feel failures in the engine operation associated with ignition, then you must immediately replace them with new ones without delay.
Do not try to save money by untimely replacement of spark plugs, since the cost of spark plugs is not very expensive, as well as the work of replacing them. By replacing old spark plugs, you will improve engine performance and reduce your vehicle's fuel consumption. Changing spark plugs yourself is quite easy. Basically, they are easily accessible under the hood of the car. You need a regular spark plug wrench to remove the spark plugs from the engine. It is also advisable to monitor the condition of high-voltage wires, since over time they can become unusable and allow electricity to pass through, which is transferred to the spark plugs, which will reduce the strength of the spark. Remember that regularly replacing spark plugs, in accordance with your car’s maintenance schedule, protects your exhaust catalyst from breakdowns and also improves engine performance!
A modern car is crammed with electronics. Multiple gauges and warning lights on the instrument panel indicate different faults. This progress has not spared Daewoo Matiz either. The most well-known signal is the “CHECK” function lighting up. This is an indication that there are problems with the operation of the engine or control unit.
Video
The video material will tell you what to do when the check engine light comes on, and also indicate the reasons and solutions.
Reasons for the check function to light up
The "CHECK" signal is usually located in the very center of the instrument cluster, where the driver can quickly pay attention to it. This function is responsible for the operation of the engine and if it signals, then there may be problems in the operation of this particular unit. Of course, this is scary for any motorist, because repairing the power unit is complex and expensive. But don’t immediately get scared and panic, the reason may be petty.
So, let’s look at what are the reasons why the “CHECK” function on the Matiz came on:
- If the indicator lights up when you start the engine, then don’t worry, everything works.
- If the “CHECK” lights up and signals for a long time, then, first of all, it is necessary to make a diagnosis, and only then worry.
- If there is a “CHECK” while driving, this may mean that the oil level in the engine is insufficient.
- The “CHECK” function is on - it’s worth checking the engine for signs of depressurization or oil leakage.
If the above reasons do not work, but the “CHECK” is lit, then this may be a signal that the spark plug has failed or low-quality fuel has been filled.
When the “CHECK” function lights up, it indicates that something is wrong with the engines and it is worth carrying out diagnostics before taking other actions.
Replace the mass air flow sensor
The mass air flow sensor regulates how much air needs to be added to the gasoline mixture for optimal ignition of the fuel. The sensor constantly reports data to the car's computer about the amount of oxygen supplied. A faulty mass air flow sensor increases fuel consumption, increases CO2 levels in the exhaust gas, and reduces engine power and smoothness. Also, if the sensor is faulty, poor acceleration dynamics are observed. In cold weather, a car with a faulty sensor has difficulty starting.
What are the reasons for the failure of the mass air flow sensor:
Most sensor failures occur due to improper installation of the air filter during its scheduled replacement. Also, if you do not regularly change the air filter, as required by the vehicle maintenance regulations recommended by the manufacturer, the mass air flow sensor may fail.
What to do:
Theoretically, you can drive for a long time with a broken mass air flow sensor (several weeks or months).
But you will notice that the longer you drive, the more your fuel consumption increases. Replacing the sensor in a car service is not that expensive, since the work itself does not take much time and is quite simple. The main costs are related to the cost of the sensor, which for some car models can be 11,000-14,000 rubles if it is an original sensor or up to 6,000 rubles if it is an analogue substitute. Replacing the sensor yourself is very simple. But due to the low cost of replacing the sensor, you can entrust this work to a mechanic at a car service center. Remember that you need to regularly change the air filter, observing the vehicle maintenance regulations!
Elimination methods
If translated literally, “Check Angie” is an engine error, which, according to the developers, should indicate to the driver that it is worth checking this particular system. So, there are several malfunctions associated with the activation of such an alarm. Let's look at the main problems that cause a "CHECK" in the engine.
Bad fuel
Low-quality gasoline, or as it is popularly called “bad gas,” can cause the engine warning light on the dashboard to fire. So, troubleshooting can take a lot of time and labor. In order to get rid of the effect, you will have to clean the fuel system. To do this you need to do the following:
- Remove and clean the fuel tank.
- Remove the fuel rail and wash the injectors using a special stand.
Replace the fuel filter, because as practice shows, after low-quality fuel it becomes clogged and completely loses its service life.
Spark plug
If one of the spark plugs is damaged, Check Engine appears on the dashboard. To fix the problem, you will have to dismantle all the elements and check them for resistance, as well as visually inspect their condition. Thus, if necessary, it is worth replacing the spark plug. As practice shows, it is best to install a completely new kit, which should be pre-adjusted, check the gaps, as well as the resistance.
Low fuel level
When the fuel level is low, the Check Engine sign appears on the instrument panel, which may also indicate that the fuel tank cap is not closed completely and the seal is broken.
Ignition coil
The absence of a spark in the cylinders immediately signals the electronic unit, which displays the inscription “check”. This may primarily be due to the fact that the ignition coil has failed. As a rule, it cannot be repaired and must be replaced.
Oxygen sensor
A clogged lambda probe is immediately visible from the inscription on the dashboard. Here, there can only be one way out - replacement. Of course, some car enthusiasts try to clean the oxygen sensor and are quite successful, but in practice it doesn’t last long and it quickly breaks down. Therefore, it is recommended to replace it immediately.
Catalyst
The catalyst may be another reason why the Check Engine message appears on the dashboard. Usually, this is due to the high mileage of the car, so when the car starts to take oil, you should prepare for the fact that this particular part will fail. But this is not the only reason. So, bad fuel or mechanical damage will lead to the replacement of this unit.
Wiring
Cases have been repeatedly noticed that when there are problems with the explosive wire, the message Check Engine pops up. Of course, the reason should be looked for in this system and, if necessary, it is worth replacing.
The electronic engine control unit can cause a “check” to appear. Thus, accumulated errors that have not been reset for a long time may cause the dashboard to display Check Engine. This can be treated quite simply by resetting all accumulated errors. But, as experience shows, things can get to the point where you have to change the software and flash the ECU.
The mass air flow sensor repeatedly causes the Check Engine to appear on the dashboard. In order to determine serviceability, diagnostics should be carried out. If necessary, replace this unit.
Replace the oxygen sensor (lambda probe)
The oxygen sensor in your car is part of the exhaust system that monitors how much oxygen is not burned in the engine's combustion chamber. This sensor helps control the vehicle's fuel consumption. A malfunctioning oxygen sensor (lambda probe) means that the car computer is receiving incorrect data, which can significantly increase fuel consumption and reduce engine power. Most cars have 2 to 4 oxygen sensors. If you have a home car error scanner, then by connecting it to the car, you can easily find out which sensor needs to be replaced.
For what reason does the oxygen sensor in a car become unusable?
Over time, the sensor becomes covered with a layer of used engine oil (oil soot), which reduces the accuracy of reading sensor readings for regulating the gasoline mixture and distributing the optimum. A malfunction of the oxygen sensor in a car leads not only to, but also to an increased content of harmful CO2 substances in the exhaust.
What to do:
If you do not replace a faulty car oxygen sensor, this can lead to your car's catalyst failing (it may burst), which will result in expensive repairs.
The cost of new catalysts is very high due to the precious alloys they contain. On some cars, there are several catalysts, the cost of which can reach up to 90,000 rubles. So don't delay replacing the sensor. Although replacing the sensor and its cost is not very small, it is not commensurate with the cost of the exhaust gas catalyst system. You can also save on replacement costs by doing it yourself. Many car manuals have detailed instructions on how to replace the oxygen sensor yourself. If you know where the oxygen sensor is located, then it will not be difficult for you to disconnect the faulty lambda probe and replace it with a new one. Remember that you cannot delay replacing this important element!
Underwater rocks
If the “CHECK” light on your Daewoo Matiz comes on, then don’t panic. Often on cars the signal is supplied from a common ECU, which, like any computer, can malfunction. This may be caused by a short circuit or replacement of electrical circuit components. Therefore, errors occur in the electronic control unit, which can serve as a “CHECK” signal.
This problem is quite easy to treat. The ECU itself needs to be connected to a software laptop and errors in the system should be corrected or outdated firmware changed. It is best to entrust this operation to specialists who know how it is done.
Daewoo Matiz check light is on
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Oh, this is an alarming feeling when the yellow “ Check Engine ” icon lights up on the Matiz dashboard!
And at the most inopportune moment it lights up, as if it senses the moment when our nervous system is most vulnerable and defenseless! And you sit behind the wheel, wondering on pins and needles, what happened to the car, you begin to listen to the noise of the engine, trying to compare with what happened “before” and what happened “after” this alarm light came on for a malfunction of some vital organ of the car. And paranoia begins! And you can already feel with your skin that the engine is working somehow wrong, more strained, with strain and the “pulling” of the car has become worse, the gears have begun to engage somehow incorrectly, the sound of the engine, like iron on glass, grinds on your nerves and it seems that a little more -just a little and you will catch the moment when the valves meet the pistons! And if this happens in a traffic jam. What to do? Should I stop and call a tow truck? Go to the service center on your own? What if this kills the matizka?!
How to reset a check on a Matiz
Oh, this is an alarming feeling when the yellow “ Check Engine ” icon lights up on the Matiz dashboard! And at the most inopportune moment it lights up, as if it senses the moment when our nervous system is most vulnerable and defenseless! And you sit behind the wheel, wondering on pins and needles, what happened to the car, you begin to listen to the noise of the engine, trying to compare with what happened “before” and what happened “after” this alarm light came on for a malfunction of some vital organ of the car. And paranoia begins! And you can already feel with your skin that the engine is working somehow wrong, more strained, with strain and the “pulling” of the car has become worse, the gears have begun to engage somehow incorrectly, the sound of the engine, like iron on glass, grinds on your nerves and it seems that a little more -just a little and you will catch the moment when the valves meet the pistons! And if this happens in a traffic jam.
What to do? Should I stop and call a tow truck? Go to the service center on your own? What if this kills the matizka?!
This is a familiar situation for many, isn’t it? And the humorous saying - the less you know, the better you sleep, just in this case does not work at all! Quite the contrary. So what to do in such a situation? There is no sensible information on any forum, but almost every one has a local technician-medium who, using the phrase “My check light is on,” immediately gives a diagnosis, cause and recommendations for repair. Fast, convincing, free. If you follow the advice of a technical medium, the probability of overcoming the problem is small, and to complaints, as a rule, technical mediums answer the same thing: “Well, I don’t know. This happened to me. ".
So, let's try to understand those secret mechanisms, causes and effects that strike our nerves and light up the alarming yellow Check Engine Daewoo Matiz dashboard .
Mere mortals call this indicator lamp the short word “check” or “checkengine” from the English phrase Check Engine (check engine); in special technical literature it can be called the abbreviation MIL ( Malfunction Indicator Lamp ) literally - malfunction indicator lamp. And in the slang of mechanics, it is often referred to as a “meat grinder” by someone else.
This indication is controlled by the OBD ( On-Board Diagnostics ) system. I think many will be surprised to learn that all these errors that from time to time so spoil our nerves were invented to control the emission of harmful substances into the atmosphere with the introduction of various EURO standards. And the Matiz Check Engine does not always mean that you need to immediately go and have your car repaired. The Engine Control Unit polls various sensors and if it receives a response that is outside the acceptable values, the OBD lights up the indicator. And he doesn’t care at all about the panic that the appearance of this signal can cause on the driver’s delicate psyche. By the way, one of the most common reasons for the warning light to come on is a poorly closed fuel filler cap, since the on-board diagnostic system very carefully monitors the fuel system of the car, including monitoring the leakage of fuel vapors. Perhaps it is for this reason that you can often hear that the cause of the fire of the notorious “meat grinder” was refueling with “bad” gasoline at some gas station.
Forum → Engine and power
Good day to all! The problem is this: the check light came on, connected to the brain and counted the errors. There are two errors P1611 and P0563. At the same time, it works/drives smoothly, does not jerk, does not stall, starts normally (it’s already -20 outside). By the way, there is a slight hum under the dashboard, like from a transformer.
Matiz 2008, bought in October 2012 from a girl, driven 28880 km, battery ALASKA CMF 60B24LS 12V 50Ah 450CCA, oil ZIC 5w40.
Help, where to climb, what to see? These mistakes bother me.
to Volmax:
Hello.
Check the on-board voltage. Error P0563 just indicates increased voltage. This is where P1611 may come from.
Sorry for the banal and probably stupid question, BUT how can I check it? at the battery terminals 12 is the norm, with the engine running 14 something (the generator is charging) is also the norm. In the program with the help of which I considered errors there are 2 parameters:
1 - voltage (OBD adapter) and 2 - voltage (control module). will this fit?
By the way, I can’t pull out the EF6 (20A) fuse, it seems to be glued. By the way, maybe this is connected.
to Volmax: Ef6 - heater fan motor. . Possibly related.
0563 - increased system voltage. . Start, turn on the heater fan and check the voltage in the circuit, not the battery. . 1611 - main relay; low voltage in the circuit - . may be a consequence.
The adapter connected to the diagnostic connector shows a voltage of 11.9-12.1V and 14.3-14.4 when the engine is running and idling. Since it’s minus outside, the idle speed on a not fully warmed up engine was approximately 1150-1250 rpm. If you turn on the heater fan (stove, if I understand correctly) to maximum, the voltage drops to 13.8.
The voltage on the control module does not show, apparently it cannot count. Later I’ll try to pull the fuse out with pliers))) since it’s impossible to pull it out with your fingers. I'm just afraid that I might rip something out there.
to Volmax:
No need to pull anything out.
Check the voltage at the battery terminals with a regular voltmeter.
Fine. I’ll come home from work, try it on and report back right away.
I arrived, ran home for a tester, and measured it. I measured the voltage at the battery terminals.
1 - key not inserted -12.6
2 - the key is inserted and turned to position 2 (ignition is on) - 12.5-12.4 (although there may be an error)
3 - engine started -14.6
4 - the engine is started and the high beams are on -14.4
5 - the engine is started, the high beams and the heater fan are on (fan speed to maximum) -14.3
all this at idle speed, the rpm was 950-980. Is it just me, or are the idle values too high?
You need to remove the heater fan motor and check for cranking. Most likely the armature is spinning a little tight in the bushings.
Check for play, clean, lubricate and the hum will no longer occur along with the whole problem. . Fuse Ef 6 20amp, carefully remove and replace. . The fact that it stuck and did not burn is not good.
Normal indicators. I wouldn't worry. As the speed increases, the voltage should not increase.
John: You need to remove the heater fan motor and check for cranking. Most likely the armature is spinning a little tight in the bushings. Check for play, clean, lubricate and the hum will no longer occur along with the whole problem. #
Yes, but I get a buzzing noise even when the engine is not running and the fan is off. When I insert the key and turn it to the “ignition on” position, I hear the fuel pump begin to pump, then it stops as it should, but the hum remains somewhere under the dashboard. And also, the hum is like a light buzzing “z-z-z-z-z-z-z-z-z-z-z”, and not like the transformer booths in the yard. If you don't pay attention, you might not even hear it.
Messir: As the speed increases, the voltage should not increase #
I didn’t measure it when the speed increased, my oversight. I'll measure it this evening.
Regarding the fuse. I don’t know how I looked, but I was wrong. in fact, I could not remove EF7 (15A) - the heating element for the tailgate glass. Carefully, thanks to the pliers, I pulled it out and replaced it. I decided to see if all the fuses were installed with the correct value. It turned out that in place of ef18 (power supply for the headlight lamp relay, headlight high beam switch) there is a 15 amp fuse installed instead of 20A (info from the book) - is this critical? And by the way, one of my lights burns sluggishly. I bought the light bulbs, but haven't changed them yet.
Check engine light on Matiz
A modern car is crammed with electronics. Multiple gauges and warning lights on the instrument panel indicate different faults. This progress has not spared Daewoo Matiz either. The most well-known signal is the “CHECK” function lighting up. This is an indication that there are problems with the operation of the engine or control unit.
Video
The video material will tell you what to do when the check engine light comes on, and also indicate the reasons and solutions.
Reasons for the check function to light up
The "CHECK" signal is usually located in the very center of the instrument cluster, where the driver can quickly pay attention to it. This function is responsible for the operation of the engine and if it signals, then there may be problems in the operation of this particular unit. Of course, this is scary for any motorist, because repairing the power unit is complex and expensive. But don’t immediately get scared and panic, the reason may be petty.
So, let’s look at what are the reasons why the “CHECK” function on the Matiz came on:
- If the indicator lights up when you start the engine, then don’t worry, everything works.
- If the “CHECK” lights up and signals for a long time, then, first of all, it is necessary to make a diagnosis, and only then worry.
- If there is a “CHECK” while driving, this may mean that the oil level in the engine is insufficient.
- The “CHECK” function is on - it’s worth checking the engine for signs of depressurization or oil leakage.
If the above reasons do not work, but the “CHECK” is lit, then this may be a signal that the spark plug has failed or low-quality fuel has been filled.
When the “CHECK” function lights up, it indicates that something is wrong with the engines and it is worth carrying out diagnostics before taking other actions.
Elimination methods
If translated literally, “Check Angie” is an engine error, which, according to the developers, should indicate to the driver that it is worth checking this particular system. So, there are several malfunctions associated with the activation of such an alarm. Let's look at the main problems that cause a "CHECK" in the engine.
Bad fuel
Low-quality gasoline, or as it is popularly called “bad gas,” can cause the engine warning light on the dashboard to fire. So, troubleshooting can take a lot of time and labor. In order to get rid of the effect, you will have to clean the fuel system. To do this you need to do the following:
- Remove and clean the fuel tank.
- Remove the fuel rail and wash the injectors using a special stand.
Replace the fuel filter, because as practice shows, after low-quality fuel it becomes clogged and completely loses its service life.
Spark plug
If one of the spark plugs is damaged, Check Engine appears on the dashboard. To fix the problem, you will have to dismantle all the elements and check them for resistance, as well as visually inspect their condition. Thus, if necessary, it is worth replacing the spark plug. As practice shows, it is best to install a completely new kit, which should be pre-adjusted, check the gaps, as well as the resistance.
Low fuel level
When the fuel level is low, the Check Engine sign appears on the instrument panel, which may also indicate that the fuel tank cap is not closed completely and the seal is broken.
Ignition coil
The absence of a spark in the cylinders immediately signals the electronic unit, which displays the inscription “check”. This may primarily be due to the fact that the ignition coil has failed. As a rule, it cannot be repaired and must be replaced.
Oxygen sensor
A clogged lambda probe is immediately visible from the inscription on the dashboard. Here, there can only be one way out - replacement. Of course, some car enthusiasts try to clean the oxygen sensor and are quite successful, but in practice it doesn’t last long and it quickly breaks down. Therefore, it is recommended to replace it immediately.
Catalyst
The catalyst may be another reason why the Check Engine message appears on the dashboard. Usually, this is due to the high mileage of the car, so when the car starts to take oil, you should prepare for the fact that this particular part will fail. But this is not the only reason. So, bad fuel or mechanical damage will lead to the replacement of this unit.
Wiring
Cases have been repeatedly noticed that when there are problems with the explosive wire, the message Check Engine pops up. Of course, the reason should be looked for in this system and, if necessary, it is worth replacing.
The electronic engine control unit can cause a “check” to appear. Thus, accumulated errors that have not been reset for a long time may cause the dashboard to display Check Engine. This can be treated quite simply by resetting all accumulated errors. But, as experience shows, things can get to the point where you have to change the software and flash the ECU.
The mass air flow sensor repeatedly causes the Check Engine to appear on the dashboard. In order to determine serviceability, diagnostics should be carried out. If necessary, replace this unit.
Causes of malfunction
If translated literally, “Check Angie” is an engine error, which, according to the developers, should indicate to the driver that it is worth checking this particular system. So, there are several malfunctions associated with the activation of such an alarm. Let's look at the main problems that cause a "CHECK" in the Nexia engine.
Bad fuel
Low-quality gasoline, or as it is popularly called “bad gas,” can cause the engine warning light on the dashboard to fire. So, troubleshooting can take a lot of time and labor. In order to get rid of the effect, you will have to clean the fuel system. To do this you need to do the following:
- Remove and clean the fuel tank.
- Remove the fuel rail and wash the injectors using a special stand.
Replace the fuel filter, because as practice shows, after low-quality fuel it becomes clogged and completely loses its service life.
Spark plug
If one of the spark plugs is damaged, Check Engine appears on the dashboard. To fix the problem, you will have to dismantle all the elements and check them for resistance, as well as visually inspect their condition. Thus, if necessary, it is worth replacing the spark plug. As practice shows, it is best to install a completely new kit, which should be pre-adjusted, check the gaps, as well as the resistance.
Low fuel level
When the fuel level is low, the Check Engine sign appears on the instrument panel, which may also indicate that the fuel tank cap is not closed completely and the seal is broken.
Ignition coil
The absence of a spark in the cylinders immediately signals the electronic unit, which displays the inscription “check”. This may primarily be due to the fact that the ignition coil has failed. As a rule, it cannot be repaired and must be replaced.
Oxygen sensor
A clogged lambda probe is immediately visible from the inscription on the dashboard. Here, there can only be one way out - replacement. Of course, some car enthusiasts try to clean the oxygen sensor and are quite successful, but in practice it doesn’t last long and it quickly breaks down. Therefore, it is recommended to replace it immediately.
Underwater rocks
If the “CHECK” light on your Daewoo Matiz comes on, then don’t panic. Often on cars the signal is supplied from a common ECU, which, like any computer, can malfunction. This may be caused by a short circuit or replacement of electrical circuit components. Therefore, errors occur in the electronic control unit, which can serve as a “CHECK” signal.
This problem is quite easy to treat. The ECU itself needs to be connected to a software laptop and errors in the system should be corrected or outdated firmware changed. It is best to entrust this operation to specialists who know how it is done.
Conclusion
The reasons why the “CHECK” function lights up on a Daewoo Matiz are quite simple, since this sensor is responsible for the full operation of the engine. To identify the causes, it is worth conducting a diagnosis and determining why this happened, and only then eliminating it.
The check light came on a long time ago. According to the diagnostics, it shows on the TPS (replaced) and on the EGR exhaust gas recirculation valve (checked and working) the check light is still on. Tell me how can I check the ECU and erase errors from it or reset it?
content .. 157 158 159 160 ..Daewoo Gentra (2013+). Cause of error P0402
P0402 - Excessive Exhaust Gas Recirculation
The P0402 error code appears in the vehicle's computer when it is detected that there is excessive exhaust gas flow in the EGR system. When the exhaust gas recirculation system is working properly, it directs only a small percentage of the exhaust gases back from the exhaust manifold to the intake manifold to reduce the combustion temperature of the fuel.
This system also reduces the content of nitrogen oxides in the exhaust gases, which are formed due to the high combustion temperature.
Causes of error (code) P0402:
-The EGR valve opens more than necessary due to a clogged vacuum diaphragm in the EGR vacuum check valve. -The EGR temperature sensor detects an excessive temperature change caused by excessive back pressure in the EGR system when the EGR valve opens. As a rule, the cause of this is partial blockage of the catalyst. -The EGR valve is stuck open due to excessive carbon buildup.
Symptoms of error P0402
-The Check Engine light on the vehicle's dashboard will illuminate and P0402 will be stored in the ECM's memory. -If the valve is stuck open, the engine may run rough. - Possible exhaust gas leakage through the backpressure sensor.
Diagnostics when error code P0402 occurs:
-First, the Master reads all saved data and error codes using a scanner. -Then he will clear the error codes and test drive the vehicle to see if the P0402 error appears again. -The technician will check the vacuum hoses, wires, and connectors to the EGR valve, control solenoid valve, temperature sensor, and EGR backpressure sensor. -He will then check the operation of the EGR valve. -The technician will also check the exhaust gas catalytic converter for damage or excessive back pressure in the exhaust gas recirculation system. -The technician will then remove the EGR valve and temperature sensor and check for excessive carbon buildup and clogged system passages.
Errors when diagnosing code P0402
-Replacing an EGR valve without first checking the pressure sensor to see if it can control the opening of the valve. -Replacing an EGR valve without checking to see if the valve is stuck open due to excessive carbon buildup.
How serious is P0402?
-Excessive exhaust gas recirculation may cause the engine to suddenly stop while the vehicle is accelerating or cause rough idling. -If the Engine Check light comes on, the vehicle will not be able to pass the exhaust emission test. -Clogged catalytic converter may result in loss of engine power or difficulty starting.
Repair when error P0402 occurs
-Replacing the EGR valve if the valve is stuck open -Replacing the catalytic converter -Cleaning or replacing the EGR temperature sensor if the sensor detects too much temperature change -Replacing the EGR back pressure control valve exhaust gases
Additional comments for troubleshooting P0402
The P0402 code will appear if the EGR temperature sensor detects too much of a temperature change when the EGR valve opens. This is usually caused by excessive back pressure in the exhaust gas recirculation system when the valve opens or a partial blockage of the catalyst.
content .. 157 158 159 160 ..
FakeHeader
Comments 26
Hi all. My wife has a Matiz 07 year old, 0.8l. It started to fluctuate and when I pressed the gas, dips appeared. I changed the spark plugs, but the failures still remained and later a check appeared. We drove it into the Koreana, threw two errors - TPS (replacement) and the fuel tank vapor recirculation valve (P0120 and P1500). The DPD was changed, nothing changed and the check did not disappear. Today I'll go look at the EGR. I read that you can drown out something like that and that there are two types of them (mushroom-shaped and barrel-shaped) and of course they cost quite a lot (mushroom-2k, barrel-6k). show, tell. first and hopefully last time I'll go there
Fuel tank vapor recirculation (absorber) and the EGR are two different things. EGR is exhaust gas recirculation
Hi all. My wife has a Matiz 07 year old, 0.8l. It started to fluctuate and when I pressed the gas, dips appeared. I changed the spark plugs, but the failures still remained and later a check appeared. We drove it into the Koreana, threw two errors - TPS (replacement) and the fuel tank vapor recirculation valve (P0120 and P1500). The DPD was changed, nothing changed and the check did not disappear. Today I'll go look at the EGR. I read that you can drown out something like that and that there are two types of them (mushroom-shaped and barrel-shaped) and of course they cost quite a lot (mushroom-2k, barrel-6k). show, tell. first and hopefully last time I'll go there
The EGR can be turned off if the ECU is reflashed to Euro2. My friend did this.
For me, for exactly the same reason, the light stops, and as soon as there is less than half a tank of gasoline and I sharply move into a left turn, the car jerks and the check light comes on, motherfucker, I’ve been suffering for a year now
Tags: check engine
Comments 26
Hi all. My wife has a Matiz 07 year old, 0.8l. It started to fluctuate and when I pressed the gas, dips appeared. I changed the spark plugs, but the failures still remained and later a check appeared. We drove it into the Koreana, threw two errors - TPS (replacement) and the fuel tank vapor recirculation valve (P0120 and P1500). The DPD was changed, nothing changed and the check did not disappear. Today I'll go look at the EGR. I read that you can drown out something like that and that there are two types of them (mushroom-shaped and barrel-shaped) and of course they cost quite a lot (mushroom-2k, barrel-6k). show, tell. first and hopefully last time I'll go there
Fuel tank vapor recirculation (absorber) and the EGR are two different things. EGR is exhaust gas recirculation
Hi all. My wife has a Matiz 07 year old, 0.8l. It started to fluctuate and when I pressed the gas, dips appeared. I changed the spark plugs, but the failures still remained and later a check appeared. We drove it into the Koreana, threw two errors - TPS (replacement) and the fuel tank vapor recirculation valve (P0120 and P1500). The DPD was changed, nothing changed and the check did not disappear. Today I'll go look at the EGR. I read that you can drown out something like that and that there are two types of them (mushroom-shaped and barrel-shaped) and of course they cost quite a lot (mushroom-2k, barrel-6k). show, tell. first and hopefully last time I'll go there
Check Engine Error - How to Determine the Cause of the Signal?
Let us immediately note that it is almost impossible to independently diagnose the reason for the appearance of a signal on the dashboard without the presence of an on-board computer. If the BC is installed, it is possible to directly view information and engine error codes. If it is missing, the only way is to diagnose the engine at a service center.
Diagnostic connector for Nexia n150 dohc
During the diagnostic process, the technician connects a computer with special software through a special service connector, which retrieves and visualizes information from the memory of the Daewoo Nexia electronic control unit.
The simplest case
Separately, it is worth saying that the appearance of a Check Engine may be associated with a normal electronics failure, low-quality fuel and other reasons. In this case, you can try to “reboot” the electronic unit by removing the negative terminal from the battery for 10 minutes. If the error does not disappear, this means that diagnostics are still necessary.
The Check Engine light is on in Daewoo Nexia
The Check Engine light came on - what to do?
In any case, if the owner sees “Check Engine” on the dashboard while the car is in motion (normally this lamp lights up after turning on the ignition and goes out after a couple of seconds), you need to listen to the engine , then stop and inspect the engine for oil stains and visible damage.
If, apart from the icon, there are no malfunctions in the operation of the internal combustion engine, you can go to a service center and diagnose the problem.
But if strange sounds appear along with the “check” - knocking, humming, creaking from the engine compartment, or the engine “troubles” and noticeably loses power, you need to stop as quickly as possible and call a tow truck.
Continued operation of the vehicle with the “Check Engine” flashing while driving and signs of engine damage may end in disaster.
The Check Engine light came on: a list of the most common faults
Typically, the following faults cause the Check Engine light to appear:
- Error in the operation of the lambda probe (oxygen sensor). This sensor is responsible for analyzing the amount of oxygen in the vehicle's exhaust gases, adjusting the fuel supply accordingly and ensuring optimal fuel efficiency parameters. The cause of its breakdown can be a large number of factors - from technical defects to low quality gasoline. If the error codes indicate a malfunction, the sensor requires replacement. It should be remembered that it is imperative to replace the sensor, since a change in the composition of the exhaust gases associated with its malfunction can lead to premature failure of the catalyst - a very expensive element of the exhaust system.
- Breakdown in the catalyst. The catalyst is responsible for cleaning exhaust gases and ensuring that the Nexia vehicle complies with modern environmental standards for CO emissions into the atmosphere. The cause of operational problems is, for the most part, the low quality of domestic gasoline and untimely completion of routine maintenance. The catalyst itself is quite expensive, and some motorists resort to removing it, while installing a “trick” - a homemade device in which the “Check” does not light up. It is not recommended to use such tricks due to the difficulties that may arise when passing a state technical inspection (the content of harmful substances in the exhaust will increase sharply).
- Failure of the mass air flow sensor, which regulates the air supply to the engine injection system. Such a breakdown leads to interruptions in the operation of the power unit caused by depletion or enrichment of the mixture and is accompanied by “floating” speed, jerking of the car in motion, etc.
- Malfunctions of the spark plugs or wiring. Interruptions associated with wear and failure of high-voltage wires and spark plugs are often accompanied by an engine error message.
One of the reasons for the Check Engine is that the spark plugs need to be replaced.
These reasons are the most common reason for the indicator to come on, but they are far from the only ones. On the 8-valve Nexia power unit with a displacement of one and a half liters (as well as on Chevrolet Lanos/Zaz Chance cars with the same engine), it is not uncommon for the “Check” to light up after a mileage of 10-15 thousand kilometers. In this case, the error code indicates a malfunction of the crankshaft sensor. In practice, no sensor replacement is required in this situation, and the failure is caused by errors in the standard software of the electronic control unit. They can be eliminated by flashing the ECU using the appropriate software. However, this procedure can only be carried out at a service center.
Another reason for the appearance of a “warning light” can be an extremely simple, but far from obvious factor for a car enthusiast - a decrease in the tightness of the fuel system caused by... a loose gas tank cap. For this reason, you should always screw the cap until the safety ratchet engages.
Why might the "Check Engine" light come on on a diesel engine?
In gasoline engines, the reasons why the check light comes on are mainly related to the ECM system - it is worth diagnosing spark plugs and ignition coils, as well as high-voltage wires and numerous sensors - camshaft position, speed, mass air flow sensor, oxygen, etc.
In diesel engines , the reasons that lead to the “Check Engine” warning (with the exception of ECM system problems) are similar: incorrect operation of sensors, problems with the exhaust gas catalyst, fuel system malfunctions. Let's look at the potential problems in more detail.
bad fuel
Often residents of the CIS are faced with the fact that the “check” lights up after the car has been recently refueled. If at the same time there is a loss of power, the reason may lie precisely in the quality of the fuel.
Incorrectly selected, poor diesel fuel can cause detonation in the engine and disrupt the process of normal combustion. The electronic engine control unit records these changes and generates an error.
To solve the problem, it is often enough to simply dilute the already filled fuel with high-quality fuel. If everything is done correctly, after a couple of kilometers, the “Check Engine” will go out by itself.
In particularly advanced cases, the fuel will have to be drained completely and the fuel supply system will have to be flushed. If after this the “check” does not go out, the error will have to be reset through the program.
fuel system tightness
The “Check Engine” warning is not always associated with serious malfunctions. Sometimes this light comes on when the engine is getting too little or too much fuel for some reason.
Therefore, the first step that the owner should take is to check the tightness of the fuel tank closure - perhaps its cap is cracked or loose. Such a banal reason often explains the appearance of a “check” on the instrument panel.
If the inspection shows cracks in the cover, it needs to be replaced urgently. If the cap is unscrewed, you just need to tighten it and drive a couple of kilometers for the “check” to go out.
the oxygen sensor (lambda probe) has failed
The oxygen sensor is involved in adjusting the proportions of the fuel mixture. It collects data on how much oxygen is contained in the exhaust gases, which is transmitted to the engine management system. Depending on this data, the ECU decides whether to enrich or lean the fuel mixture on gasoline engines.
In diesel engines, a lambda probe , together with a mass air flow sensor (MAF), helps to accurately determine the degree of exhaust gas recirculation for each operating mode.
That is, the purpose of the oxygen sensor is to transmit accurate data to the engine control system in order to make its operation more economical and environmentally friendly. Modern cars are equipped with 2-4 oxygen sensors.
Over time, the lambda probe becomes covered with a layer of used engine oil and begins to transmit erroneous data to the engine ECU. As a result, too much or too little fuel enters the chamber, which leads to malfunction.
The solution to the problem is to replace the faulty oxygen sensor, and it is better not to delay it, because a faulty lambda probe can damage the catalyst.
The mass air flow sensor has failed
The mass air flow sensor, together with the oxygen sensor, is involved in dosing fuel when preparing the air-fuel mixture.
When the mass air flow sensor fails, the proportion of formation of the fuel mixture is disrupted, hence malfunctions of the diesel engine, difficulties with cold starts, loss of power and increased diesel consumption.
Moreover, sensor failure may be caused by a violation of the air filter replacement regulations.
A faulty sensor needs to be replaced, otherwise problems with engine operation will not be eliminated, and the “Check Engine” warning will remain on the instrument panel.
breakdown of the exhaust gas catalyst
The catalyst cleans the exhaust and reduces the amount of nitrogen oxide that a diesel engine emits into the atmosphere during operation.
The catalyst may break due to a failed lambda probe, as described above. Overheating, the catalyst housing bursts and a “check” appears on the dashboard.
You cannot drive with a non-working catalyst - the car will lose performance and consume more fuel.
Due to the fact that repairing the part is difficult and expensive, many car owners in this situation simply cut out the catalyst and install a flame arrester instead.
engine overheating / oil starvation
If the “Check Engine” light comes on in the summer, and even in a traffic jam, it’s bad. The reason should be sought in overheating of the motor.
And if its temperature is normal and no antifreeze leaks are detected, it is worth checking the engine oil level and its condition.
If the oil is in order, you can start the internal combustion engine and listen to the uniformity of its operation. If the oil is below the minimum level on the dipstick and looks suspicious, it is better to go to a service center for diagnostics, and not under your own power.
