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Manufacturer Controlled DTC

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.

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 Diagnostic Trouble Codes (DTC) have recently been cleared with a scan tool.

Check engine light

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