Conditions For Setting DTC

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

If the ECM detects a difference in vehicle speed with the VSS of more than 5 MPH, then DTC P0500 is set.
No vehicle speed with engine RPM greater than 1000 RPM and engine torque more than 221 ft. lbs. (300 N.m).