What Causes the Car's Warning Light to Illuminate?

1 Answers
LaPaislee
07/29/25 3:26pm
Poor gasoline quality can lead to incomplete combustion of the air-fuel mixture in the cylinders, causing the pollution light to illuminate and also making it prone to carbon deposits. Below is an introduction regarding the warning light: Causes: When combustion occurs inside the engine, air intake is required. In this process, the air filter plays a crucial role. If the car's air filter is dirty and not cleaned regularly, it can affect the car's air intake. Over time, this can lead to blockages, and in severe cases, it can cause the engine warning light to illuminate. Method: Inspect each cylinder's fuel injector. Allow the engine to idle and disconnect each fuel injector connector one by one, checking if there is any change in idle speed. If disconnecting each cylinder's fuel injector results in a similar reduction in idle speed, it indicates that all fuel injectors are functioning normally. If disconnecting a particular fuel injector causes no change in the engine's idle speed and stability, measure the resistance of the injector connector to see if it is between 10~13 ohms. If it does not meet the standard, replace the fuel injector.
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