Conditions for Setting the DTC: P0851

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

The ECM detects Park/Neutral, the Park/Neutral switch signal equals 0 volts, Low, when the IMS reports a Drive range for 3 seconds.
TP is equal to or greater than 10 percent.
Engine torque is equal to or greater than 75 N.m (55 lb ft).
Vehicle speed is equal or greater than 10 km/h (6 mph).