Conditions for Running the DTC

WARNING: This page is about a different car, the 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 Chevrolet TrailBlazer, and 2004 Buick Rainier. However, it is still accessible from the selected car via links, so may be relevant.

No VSS assembly DTCs P0502 or P0503.
The system voltage is 10-18 volts.
The engine speed is greater than 450 RPM for 5 seconds.
The engine is not in fuel cutoff.
The engine torque is 54-542 N.m (40-400 lb ft).
The engine vacuum is 0-105 kPa (0-15 psi).