Diagnostic Aids

WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2003 Mercury Sable, 2003 Mercury Mountaineer, 2003 Mercury Marauder, 2003 Mercury Grand Marquis, and 2003 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.

DTC P1000 indicates that not all of the On-Board Diagnostics II (OBD-II) monitors have completed. DTC P1000 can only be cleared from memory with a completed drive cycle, with all OBD-II monitors being successfully completed. For drive cycle diagnostic monitor descriptions, see DIAGNOSTIC MONITORS . In some states, DTC P1000 must be cleared to pass an inspection/maintenance test. Vehicle operator should be informed that law specifies additional city and highway driving must be done to complete OBD-II system check. This additional driving must occur before vehicle is tested at inspection/maintenance station. Amount of driving required varies with individual driving patterns. To complete a drive cycle, see DRIVE CYCLES . After all diagnostic monitors successfully complete, SYSTEM PASS can be obtained from PCM.

DTC P1000 will set in PCM memory when any of the following conditions occur:

Vehicle is new from factory and has not yet completed an OBD-II drive cycle.
Battery or PCM has been disconnected.
An OBD-II monitor has failed before completion of OBD-II drive cycle.
PCM memory has been cleared with a scan tool.
The PCM has been flashed and the vehicle has not yet completed an OBD Drive Cycle.

NOTE: DTC P1000 cannot be cleared from PCM if vehicle is equipped with Power Take Off (PTO) and circuit is shorted to VPWR or B+, or if PTO is on during testing.