Conditions for Running the DTC: P1631

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The engine speed is greater than 500 RPM.
Ignition voltage is between 8-18 volts.
High side driver 1 is enabled.
DTC P1631 has not failed this ignition.