Conditions for Setting the DTC

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Position A signal or position B signal circuit on the rear position sensor must be less than 0.075 volts.
Position A signal or position B signal circuit on the rear position sensor must be greater than 4.925 volts.
The 5 volt reference circuit is open or shorted to ground.
The position sensor ground circuit is open.