What is the reason why BYD s7 engine fault light is on?

The reason why BYD s7 engine fault light is on is: 1. The throttle valve is too dirty, resulting in too rich mixture; 2. Excessive carbon deposition in the engine leads to unqualified exhaust emission; 3. Engine oxygen sensor failure.

The causes and solutions of BYD engine fault light are as follows:

1, exhaust emission is not up to standard: such as poor fuel, failure of three-way catalyst, excessive carbon deposition in intake pipe, fuel nozzle blockage, failure of oxygen sensor, occasional engine fire, etc. , will basically affect the lighting of engine fault lights, of which poor oil quality has the greatest influence on the lighting of engine fault lights; Just replace the three-way catalytic converter;

2. The lighting of the fault lights affected by the poor working of the engine system, such as the fault of the accelerator pedal sensor, the accelerator position sensor, the air flow meter and the crankshaft position sensor, or the poor line contact, will basically affect the lighting of the engine fault lights; Need to replace related sensors or lines;

3. Some vehicle transmission system faults are also indicated by engine fault lights, such as internal transmission faults, slippage, high temperature, etc. Need to go to the repair shop for repair inspection.

The yellow light of the engine fault light indicates that there is something wrong with some parts of the vehicle engine, so it should be stopped immediately for inspection. If the engine failure light is red, you need to stop immediately and contact the repair shop for road support.

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