What Causes the Fault Light to Illuminate in a Haval H6?
1 Answers
The reasons for the fault light illuminating in a Haval H6 include poor-quality or substandard gasoline, oxygen sensor malfunction, excessive spark plug carbon buildup, and engine knocking. Regardless of the cause triggering the engine fault light, it is necessary to use a computer diagnostic tool for diagnosis. If it is a false fault code, simply clear it. If there is a genuine fault, troubleshooting and repairs should be conducted based on the fault code, such as cleaning spark plug carbon deposits, replacing the oxygen sensor, or changing the gasoline. Often, shortly after refueling, the engine fault light on the car's dashboard illuminates. This is usually due to filling up with poor-quality gasoline at non-standard gas stations, leading to incomplete combustion of the air-fuel mixture during engine operation and triggering the fault light. While this does not affect driving safety, it can cause some degree of harm to the engine. The front oxygen sensor's role is to detect the air-fuel ratio under different engine operating conditions, with the ECU computer using this signal to adjust fuel injection and calculate ignition timing. If the oxygen sensor is damaged or its connector is damaged or loose, it can cause the air-fuel mixture to become too lean or too rich, leading to the fault light illuminating. Spark plug carbon buildup can result in poor engine performance, manifesting as difficulty starting, unstable idling, poor acceleration, backfiring during rapid acceleration, excessive exhaust emissions, and increased fuel consumption. Engine knocking can cause the car to lack power during driving, produce excessive engine noise, and in severe cases, be accompanied by a knocking sound from the cylinders.
