Will Poor Fuel Quality Cause the Engine Warning Light to Illuminate?

1 Answers
NoraLee
07/25/25 10:21am
Poor gasoline quality can cause the engine warning light to illuminate. The following are the reasons that may trigger the engine warning light: Poor Fuel Quality: Many car owners notice that the engine warning light comes on after refueling, but the engine runs and sounds normal when the car is started. This is usually caused by fuel quality issues. Generally, adding a fuel additive or refueling with fresh gasoline after the current fuel is used up can resolve the issue. In such cases, the vehicle can continue to be driven without safety concerns. Oxygen Sensor Malfunction: If the engine warning light illuminates while driving, it is often due to a problem with the engine sensor. From a repair perspective, this phenomenon is typically caused by a faulty front oxygen sensor, which detects abnormal data in the air-fuel mixture ratio. A visit to a repair shop for computer diagnostics and replacement is necessary to fix this issue.
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