Conditions for Setting the DTC

WARNING: This page is about a different car, the 2006 GMC Yukon XL, 2006 Chevrolet Suburban, and 2006 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

The TAC module detects that the predicted and the actual throttle positions are not within a calibrated range of each other.
The PCM and the TAC cannot determine the throttle position.
Both of the TP sensors are invalid.
All of the above conditions are met for more than 1 second.