Retrieve Continuous Memory Diagnostic Trouble Codes (DTCs)

Retrieving continuous memory DTCs is a functional test of the PCM. The DTCs can be retrieved or cleared with the ignition ON and the engine OFF. Unlike the KOEO and KOER self-tests, which can only be activated on demand, the continuous monitor is always active in monitoring the system. When a concern is detected, a DTC is stored in memory to be retrieved at a later date, making it possible to diagnose intermittent concerns.