Conditions for Running the DTC

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 GMC Savana Special, 2003 GMC Savana Camper Special, 2003 GMC Savana, 2003 Chevrolet RV Cutaway, and 2003 Chevrolet Cutaway. 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.