The PCM controlled lamps are intended to alert the driver to an operating condition which may require immediate attention.

The PCM commands the Low Oil Level Lamp on if the engine oil level sensor indicates that a low oil level condition exists. The PCM determines whether or not to test for low oil level based on the difference between engine coolant temperature at the last shutdown and engine coolant temperature at startup. This is to ensure that the oil has drained back into the oil pan before testing.

The PCM monitors the Engine Oil Level Switch signal at start-up to determine if the engine oil is OK. If the PCM determines that a low oil level condition exitsts, the PCM will illuminate the Low Oil Level indicator lamp.