What Are the Reasons for the Car Engine Malfunction Light to Illuminate?

1 Answers
McJanelle
07/29/25 7:14pm
Reasons for the car engine malfunction light to illuminate: 1. It could be that the fuel pump is not pumping fuel, causing the car to fail to start and become immobile; 2. It might also be due to an oxygen sensor malfunction, in which case the car can still operate normally, but it may lead to deviations in the engine's air-fuel ratio control. Another possibility for the malfunction light to illuminate is a false fault, which is relatively common. For example, if someone out of curiosity unplugs and then reconnects a certain connector, the ECU may issue a warning for such improper operation. In reality, there is no issue with the car, and simply clearing the fault code will suffice.
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