What causes the emission system warning light to illuminate in the Trumpchi GS4?

1 Answers
HaydenMarie
07/29/25 7:37pm
Emission system warning light illumination may be caused by the following reasons: Component issues: The main component problems triggering the engine warning light are sensor-related, including coolant temperature, crankshaft position, air flow, intake air temperature, oxygen sensors, etc. When these components are damaged or have poor connections, the vehicle's ECU cannot accurately obtain engine data, resulting in the illumination of the engine warning light. Engine spark plug failure, ignition coil failure, fuel pump failure, or fuel line blockage can all lead to poor combustion of the engine's air-fuel mixture. This poor combustion can cause engine carbon buildup or knocking issues. Fuel quality problems: Using substandard fuel may cause engine knocking or carbon buildup, triggering the warning light.
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