Retrieve/Clear Continuous Diagnostic Trouble Codes (DTCs): Notes

Retrieve/clear continuous DTCs is a functional test of the PCM. DTCs can be retrieved or cleared with the ignition on and the engine off or running. 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. DTC P1000 may be the only DTC displayed, indicating an incomplete on board diagnostic (OBD) drive cycle (more drive time needed). The fuel injection control module (FICM) continuously monitors the injector circuits for a concern. The FICM sends failure information through the controller area network (CAN) and a PCM DTC is set.