Conditions for Setting the DTC
WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
The TP sensor 1 voltage is less than 0.376 volts or more than 4.506 volts.
OR
The PCM learns a minimum throttle position of more than 0.714 volts.
OR
The TP sensor reference voltage is less than 4.54 volts or more than 5.21 volts.