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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1659 (Theft Deterrent System) >> Diagnostic Information and Procedures >> DTCP1631: PCM Did Not Receive A Valid Password >> Conditions for Setting the DTC

Conditions for Setting the DTC

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

The powertrain control module (PCM) did not receive a valid password before the fuel disable decision point was reached.