•  If the engine oil level is detected and it is not within the specified value, the wrench indication (wrench indicator light)/engine oil level warning indication (engine oil level warning light) in the instrument cluster illuminates.

•  The PCM detects the engine oil level based on the engine oil level sensor signal.

•  The engine oil level warning indication is built into the instrument cluster.

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•  The PCM calculates the engine oil level based on the engine oil level sensor signal and the vehicle driving information.

•  If the PCM determines that the engine oil level is not within the specified value, it sends wrench indication (wrench indicator light)/engine oil level warning indication (engine oil level warning light) request to the instrument cluster.