P0850, P0851 or P0852

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Ignition voltage is between 8-18 volts.
Engine Speed is greater than 1000 RPM.
TP is equal to or greater than 8 percent.
Engine torque is equal to or greater than 75 N.m (55 lb ft).
Vehicle speed is equal to or greater than 10 km/h (6 mph).