Conditions for Running 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.

DTC P1626 is not active.
The powertrain control module (PCM) is not in password learn mode.
The VTD (Passlock) system is enabled.
The fuel enable decision point has been reached, or the engine is cranking.