Powertrain On Board Diagnostic (OBD) System Check

Perform the Powertrain On Board Diagnostic (OBD) System Check, when the following conditions are present:
^ When the MIL does not turn ON when the ignition switch is turned to the RUN position. See above for MIL Operation
^ When the MIL remains ON while the engine is running
^ When the MIL is flashing while the engine is running
^ When a driveability symptom is determined