Conditions for Setting the DTC: P0120
WARNING: This page is about a different car, the 2010 Pontiac G5 and 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
TP sensor 1 voltage is less than 0.32 V or greater than 4.7 V for greater than 0.2 s.