DTC P0601 - Pcm Memory & DTC P0603 - Keep Alive Memory Errors

Turn ignition off. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Clear DTC(s). Start engine and run for one minute. If DTC(s) reset, replace PCM and retest system. If DTC(s) do not reset, check for an intermittent problem. See TESTS W/O CODES article.