What causes the engine fault code in Haval H6?

1 Answers
OStella
07/30/25 5:19am
Haval H6 engine fault code causes are as follows: Poor fuel quality, not meeting standards: Most car owners have likely experienced this—shortly after refueling, the engine warning light appears on the dashboard. This is usually due to filling up with low-quality fuel at non-standard gas stations, leading to incomplete combustion of the air-fuel mixture and triggering the engine warning light. While this does not affect driving safety, it can cause some degree of harm to the engine. Oxygen sensor failure: There are two oxygen sensors installed in the car, one before and one after the three-way catalytic converter. The front oxygen sensor detects the air-fuel ratio under different engine conditions, while the ECU uses this signal to adjust fuel injection and calculate ignition timing.
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