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List of the catalog of this article:

• 1. What is the reason why the engine fault light is on
• 2、 What is the situation where the car engine fault light is on?
• 3, What is the reason why the engine light is on after maintenance
• 4, What to do if the engine fault light is on

What is the reason why the engine fault light is on

1. When the sensor is damaged, poor contact or the signal is interrupted, the engine fault light will turn on. Poor engine maintenance is the most common reason for engine failure. Therefore, it is suggested that the car should be maintained on time and maintain good driving habits, otherwise it will increase the burden of engine operation.

2. There are many reasons: vehicle engine ignition system failure. The engine start system of the vehicle fails. Fault of the engine fuel injection system. The engine intake and exhaust system is faulty. Engine ECU failure, the above problems will cause the engine failure light to light up.

3. If there is a problem with the air intake system, there will be poor combustion and the engine fault light will turn on.

4. Maybe you don't know the reason why the car engine fault light turns on. As an old repairman, I can briefly explain it to you. As for the oil, it is necessary to choose the appropriate oil and gasoline according to the characteristics of the engine. There is a problem with the sensor of the vehicle, causing the fault light to turn on.

5. There are about three reasons why the engine fault light is on: fake fault problem: the engine fault light is on, but it is still working, and even if it is detected, the problem cannot be found. This may be a fake fault problem. The engine fault light is on because of the garbled code generated by the car ECU during the calculation process.

What is the situation where the car engine fault light is on?

1. If there is a problem with the air intake system, there will be poor combustion, and the engine fault light will turn on.

2. Sensor problems, including water temperature, crankshaft position, air flow rate, intake temperature and oxygen sensor. Engine maintenance problems. Oil quality problems, including fuel and engine oil.

3. The engine fault light may be a temporary fault. The specific manifestation is that the car has no obvious symptoms when driving, and the engine fault light is on for a period of time and off for a period of time. The temporary failure does not seem to have much impact, but it may also be a "hidden killing machine". Therefore, the owner of the car should not ignore it and should find time to check the vehicle.

What is the reason for the engine light after maintenance

1. The engine fault light is on, but It does not affect normal driving. There are three reasons: First, the exhaust emissions of the car do not meet the standard, which is mainly caused by excessive carbon accumulation.

2. Air flowmeter failure: Air flowmeter is one of the important sensors of the engine control system. If the air flowmeter fails or is polluted, it will lead to insufficient combustion of the engine, which will turn on the engine failure light.

3. The specific reasons why the engine alarm light is on are as follows: sensor problems: the sensor includes water temperature and crankshaft position, air flow, intake temperature, oxygen sensor, etc. When these sensors are damaged, poor contact or the signal is interrupted, the ECU of the car cannot accurately obtain the engine data, which will cause the engine fault light to turn on.

How to deal with the engine fault light on

1. The elimination method of the car engine fault light is as follows: pay attention to whether the engine is running normally, whether there are jitter, black smoke and other problems, if so on, try not to Start up. Special note that you must not start it again when the red light is on.

2. How to solve the problem of the yellow light of the engine fault light? There are many reasons why the engine fault light turns on, such as: carbon accumulation and dirt in the throttle valve, spark plug or ignition coil failure., air intake system failure, non-standard fuel filling, abnormal cylinder pressure, ECU failure and exhaust system failure, etc.

3. [Pacific Automobile Network] When the engine fault light is on, the vehicle should be started and turned off. After starting and turning off the car three times, start the vehicle again and observe whether the fault light is still on. If it is still on, you need to go to the repair shop in time to check the fault code and check if it is an engine problem. It's still a sensor failure.

4. Let me tell you that the handling method when the engine fault light is on is as follows: Read the fault code: You can contact a professional car repair shop or use the car fault diagnosis to read the fault code to determine the specific cause of the fault. Check the engine: Check the engine for abnormal noise, vibration or strange smell.

5. The method of eliminating the engine fault light can start and turn off the vehicle three times in a row, or unplug the negative pole of the engine battery, wait for 30 seconds to connect, and basically eliminate it. If the fault light still doesn't go out after the power is cut off, or it goes out as soon as it is repaired and turns on again after a few days, in this case, the engine is indeed faulty, and you should go to the repair shop for inspection.