Conditions for Running the DTC: P0221

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

The ignition voltage is greater than 7 volts.
The TP sensor 2 voltage is between 0.16-4.9 volts.
DTC P0221 runs continuously once the above conditions are met.