What does it mean when the WARN warning light comes on in a diesel vehicle?

[LawsonAnn]

When the WARN warning light comes on in a diesel vehicle, it indicates that there is a fault in the engine. The reasons for the engine warning light to illuminate are as follows: 1. Sensor damage, poor contact, or signal interruption can cause the engine warning light to come on. 2. Fuel quality issues: Poor-quality gasoline can lead to incomplete combustion of the air-fuel mixture in the cylinders, triggering the warning light. 3. Faults in the engine's spark plugs, ignition coils, fuel pump, or clogged fuel lines can all cause poor combustion of the air-fuel mixture. Poor combustion results in engine carbon buildup or knocking issues, which are eventually detected by the engine's oxygen sensor. After reporting to the ECU, the warning light naturally illuminates as a warning.