The reason why the engine fault light is on.

The reason why the engine fault light is on.

The engine is the heart and power source of the vehicle. In the dashboard of the vehicle, there is an icon in the shape of an engine, which usually lights up when the vehicle starts the self-test, but then goes out. What should I do if the light is on when there is engine trouble while driving? The standard practice is to keep calm and solve the problem. Next, let's understand the common reasons why the engine fault light is on.

One: The common reasons are inaccurate engine sensor signals, mainly including:

1, insufficient maintenance, not cleaning the throttle for a long time.

If the engine is not cleaned for a long time, some fuel vapor will be absorbed after carbon accumulation. For example, the dirty throttle position sensor leads to poor engine operation, accompanied by insufficient power, idling jitter, engine fault light on and so on.

2. Low fuel quality

There are many impurities in inferior fuel, and carbon deposition will occur after long-term use. For example, the oxygen sensor is poisoned, and the engine computer can't detect the oxygen content in the exhaust pipe normally, which affects the normal work of the engine fuel injection system.

3. Long-term use of non-pure brand air filters.

Long-term use of non-pure brand air filter, fine dust can not be completely filtered, air flowmeter is blocked by dust, resulting in inaccurate measurement.

Second, other engine problems may also be the cause:

1: The engine harness was bitten by a mouse.

Parking in sewers and other places for a long time may be bitten by rats and damage the engine wiring harness, causing the engine fault light to light up.

2: High engine temperature

Poor heat dissipation of the engine, long-term high temperature will lead to premature combustion of the mixture, and the engine will not work normally. At the same time, the knock sensor in direct contact with the engine block may also melt.