Conditions for Running the DTC

WARNING: This page is about a different car, the 2006 GMC Sierra, 2006 GMC Cab & Chassis Sierra, 2006 Chevrolet Silverado, and 2006 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

No TPS DTC P0121, P0122 or P0123.
No VSS DTC P0502 or P0503.
No DTC P0730.
The engine is running greater than 60 seconds.
The system voltage is 6-18 volts.
The commanded gear is 3rd or 4th.
The PTO mode is not active.