What is the reason for the Audi engine's yellow light staying on but everything else being normal?

1 Answers
McOwen
07/29/25 7:24pm
The yellow engine warning light being on indicates that there is a fault in the engine, but this fault does not affect the normal operation of the engine, so maintenance is required. This situation may be due to a sensor malfunction or a false fault. You can try starting and turning off the car three times in a row, or disconnect the negative terminal of the car battery, wait for 30 seconds, and then reconnect it to check if it is a false fault. Engine emission system failure, fuel quality issues, or carbon buildup in the vehicle's engine may cause the emission system to malfunction. It is recommended to clean the throttle body and intake tract carbon deposits, clean the three-way catalytic converter, and then use a computer to perform decoding to see if the fault disappears after driving for a while. If the engine fault indicator light is on but there are no abnormal sounds in the engine compartment, no other abnormal prompts on the dashboard, the vehicle's power is not affected, and the transmission's upshift is not affected, you can continue driving to the 4S store for further inspection, as intake and exhaust issues may cause the engine fault light to come on, depending on the specific situation.
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