DTC P0603: Internal Control Module Keep Alive Memory Error
Connect scan tool to Data Link Connector (DLC). Clear DTCs. Turn ignition off. Start engine if possible. If DTC P0601 or P0603 resets, replace PCM. Retest system.
Connect scan tool to Data Link Connector (DLC). Clear DTCs. Turn ignition off. Start engine if possible. If DTC P0601 or P0603 resets, replace PCM. Retest system.