Conditions for Setting the DTC
WARNING: This page is about a different car, the 2011 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
P1516
The indicated throttle position does not match the predicted throttle position for greater than 1 s.
P2101
The indicated throttle position does not match the predicted throttle position for greater than 1 s.
P2119
The ECM determines that the throttle blade did not return to the rest position within 1 s.
P2176
The difference between the predicted and the actual throttle position is greater than a calibrated amount for greater than 1.8 s.