What Causes the Engine Warning Light to Illuminate and Lack of Power When Accelerating?

[LaJohnny]

When the engine warning light on the car dashboard illuminates and there is a lack of power when accelerating, the possible reasons are as follows: 1. Oxygen sensor malfunction: To ensure complete combustion of the air-fuel mixture, enhance engine power, and reduce harmful emissions, the ECU uses the oxygen sensor to detect oxygen concentration in the exhaust and adjust the fuel injection accordingly, maintaining the optimal air-fuel ratio. If the oxygen sensor fails and the ECU cannot receive oxygen concentration data, the engine warning light will turn on, accompanied by a lack of power during acceleration. 2. Poor fuel quality: Low-quality gasoline leads to incomplete combustion of the air-fuel mixture, triggering the engine warning light and causing a lack of power during acceleration.