Conditions for Setting the DTC
WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
C0298
The EBCM receives a serial data message stating that the PCM has lost the ability to reduce engine torque.
P1571
The PCM receives an invalid requested torque signal for 3 seconds.