What Causes the Fault Light to Illuminate in Haval H6?
2 Answers
The reasons for the Haval H6 fault light to illuminate include poor quality or substandard gasoline, oxygen sensor failure, 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 repair should be carried out 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 insufficient combustion of the air-fuel mixture during engine operation and triggering the fault light. While it does not affect driving safety, it may 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, and the ECU adjusts the fuel injection volume and calculates ignition timing based on this signal. If the oxygen sensor is damaged or the sensor connector is faulty or loose, it can cause the mixture to be too lean or too rich, leading to the fault light illumination. Spark plug carbon buildup can result in poor engine performance, manifesting as difficulties in 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 the sound of piston slap.
I've been driving my Haval H6 for over three years, and dashboard warning lights are quite common. The most frequent one is the yellow engine light, which is usually caused by fuel quality issues – it came on after refueling at a small gas station last time, but switching to two tanks of proper fuel fixed it. If the red brake system light comes on, stop immediately and check the brake fluid level; I once discovered a leaking brake hose mid-drive. The tire pressure warning light mostly indicates a puncture, which can be temporarily fixed with the onboard air pump. A little tip: when the battery is low, multiple warning lights may give false alarms, but they disappear after jump-starting and rebooting. Of course, don't push your luck – it's safest to get a computer diagnosis at the 4S shop, especially for precision components like the turbo pressure sensor which you can't fix yourself.
