October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Malfunction History & Information Flags

Engine information flags will not cause SERVICE ENGINE SOON light to glow. Unlike hard failures and intermittent failures, information flags and codes stored in malfunction history will not be erased from PCM memory after 50 engine restarts. Flags and codes stored in malfunction history can only be retrieved and cleared from PCM memory using a scan tester.