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O2 sensors mount in the exhaust manifold, attach to the engine, and collect toxic emission gases. It identifies the unburned air, informs ECU, stabilizes combustion, and improves engine efficiency.  Why is my check engine light still on after changing O2 sensor? Check engine light can still be ON after changing the O2 sensor because the codes …

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Electronic control unit of a car manages the engine performance and runs it at operating rotations. It regulates the fuel level that flows on the cylinders and combustion chambers.  Should You Reset ECU After Replacing O2 Sensor? You should reset ECU after replacing the O2 sensor because the car has poor performance without resetting, and …

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