Symptoms

- Engine Light ON (or Service Engine Soon Warning Light)

Possible Causes

- The vehicle is new from the factory. - Battery or Powertrain Control Module (PCM) had recently been disconnected. - An OBD monitor failure occurred before completion of an OBD drive cycle. - PCM Detected Trouble Codes (DTC) have recently been cleared with a scan tool.

When Detected

If DTC P1000 is triggered after DTCs have been cleared, all engine management OBD diagnostic monitor drive cycles have not been cleared.

Description

The On Board Diagnostic (OBD) monitors are performed during the OBD Drive Cycle. P1000 is stored in continuous memory if any of the OBD monitors do not carry out their full diagnostic check.