Self-Diagnostic System: Notes

When a system fault occurs, MIL (CHECK ENGINE light) on dash will glow to inform driver a problem exists. Light will remain on until fault goes away or system is serviced. If fault goes away (system parameter returns to normal operation) before it is serviced, MIL will go out. Related fault code will still remain in ECM memory until cleared. Stored codes may later be accessed and identified by counting flashes of MIL or accessing Data Link Connector (DLC) with appropriate scan tester.