Car Shows Yellow Engine Light

1 Answers
DeRiver
07/29/25 9:48pm
There are several reasons why a car's engine light turns yellow: 1. Dirty engine cylinders with carbon deposits: After a certain period of use, the engine will inevitably accumulate carbon deposits. These deposits can alter the engine's design parameters and, due to their unstable nature and heat retention, can cause uncontrolled ignition, leading to engine knocking. 2. Poor engine combustion: Oxygen sensors are installed in the engine to monitor combustion conditions. If the combustion state is poor, the engine warning light will illuminate.
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