What Causes the Engine Yellow Light to Appear on the Dashboard?

[DanteDella]

The reasons for the engine yellow light appearing on the dashboard are: 1. Sensor issues: When sensors such as water temperature, crankshaft position, air flow, intake temperature, and oxygen sensors are damaged, have poor contact, or experience signal interruption, the car's ECU cannot accurately obtain engine data, which can trigger the engine fault light; 2. Maintenance issues: Irregular maintenance and poor driving habits can increase the burden on engine operation; 3. Fuel quality issues: The fuel added to the car has a specific grade, and failure to meet the required specifications can cause engine wear; 4. Poor combustion of the air-fuel mixture: This can lead to engine carbon buildup or knocking issues, which are detected by the engine's oxygen sensor; 5. False faults: Minor collisions during driving, tampering with certain engine connectors, or temporary signal interruptions in the ECU can cause the engine yellow light to illuminate.