What does it mean when the yellow engine light comes on in a car?

1 Answers
StTeagan
07/30/25 4:36am
The yellow engine light indicates an intermittent engine fault, meaning the engine control system has detected inaccuracies in engine operation or certain sensor signals. Reasons for engine warning light illumination: 1. Dirty engine cylinders with carbon deposits. Over time, engines inevitably accumulate carbon deposits, which can alter the engine's designed parameters. 2. Poor combustion condition. Suboptimal combustion is the primary cause of engine warning light activation. To ensure proper engine operation and maintain its service life, oxygen sensors are installed to monitor combustion status.
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