What are the reasons for the engine fault light to illuminate?

1 Answers
LaLouis
07/29/25 10:33am
There are several reasons why the engine fault light may illuminate: 1. Poor engine combustion state: Oxygen sensors are installed on the engine to monitor the combustion state. If the combustion state is poor, not only will the fault light illuminate, but it will also lead to fuel wastage and excessive engine wear. 2. Dirty engine cylinders with carbon deposits: Over time, carbon deposits inevitably accumulate inside the engine. These deposits can alter the engine's design parameters and, due to their unstable nature and heat retention, can cause irregular ignition, leading to engine knocking.
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