What are the reasons for the engine warning light to illuminate?
1 Answers
Engine warning light may illuminate due to poor gasoline quality, faulty oxygen sensor, malfunctioning mass air flow sensor, or spark plug carbon deposits. Below are detailed explanations: Poor gasoline quality: Using low-quality gasoline from gas stations can lead to incomplete combustion of the air-fuel mixture during engine operation, triggering the engine warning light. In this case, it is necessary to switch to higher-quality gasoline. Faulty oxygen sensor: A damaged oxygen sensor or loose/damaged sensor connector can cause the air-fuel mixture to become too lean or too rich, resulting in the warning light activation. The oxygen sensor needs to be inspected and replaced. Malfunctioning mass air flow sensor: The mass air flow sensor (also called air flow meter) measures the intake air volume and converts it into electrical signals sent to the ECU. If faulty, the mass air flow sensor requires inspection and replacement. Spark plug carbon deposits: Carbon buildup on spark plugs can cause poor engine performance, manifesting as hard starting, unstable idling, poor acceleration, backfiring during rapid acceleration, excessive exhaust emissions, and increased fuel consumption. In this situation, the spark plug carbon deposits need to be cleaned.
