Test P: The Malfunction Indicator Lamp (MIL) Is Never/Always On

PINPOINT TEST P:THE MALFUNCTION INDICATOR LAMP (MIL) IS NEVER/ALWAYS ON

P1-P3:

Normal Operation
The powertrain control module (PCM) monitors and controls the powertrain functions. When a PCM concern is detected, the PCM provides a signal to the instrument cluster over the communication network, and the instrument cluster to turn on the malfunction indicator lamp (MIL).

Possible Causes
- PCM
- instrument cluster