What does it mean when the engine light in the car is yellow?

[VanCharles]

When the engine light in the car is yellow, it indicates that there is a fault in the engine. Generally, if an indicator light on the instrument cluster illuminates, it means that the corresponding component is experiencing an abnormality. The related explanations are as follows: 1. Engine oxygen sensor failure: There are many reasons that can cause the engine light to illuminate, one of which is a damaged engine oxygen sensor. The vehicle's onboard computer uses the oxygen sensor to monitor the oxygen concentration in the exhaust gases. Based on the information transmitted by the sensor, it controls the engine's fuel injection amount and adjusts the air-fuel ratio. If the oxygen sensor is damaged and the onboard computer cannot receive the information transmitted by the sensor, the engine light will illuminate. 2. Airflow sensor failure: Another possible cause is a damaged airflow sensor. If the airflow sensor is damaged and the onboard computer cannot detect the intake air volume information, the engine light will naturally illuminate, and it will also affect the normal operation of the engine.