Conditions for Running the DTC

WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. 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.