Conditions for Running the DTC

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Ignition voltage is between 9-18 volts.
No TCM DTCs P0601, P0602, P0603, or P0604.
No IMS DTCs P1825 or P1915.
No Communication DTCs U0001, U0100, U0101, U2105, or U2106.

P0851

No TP DTCs P0121, P0122, or P0123.
No OSS DTCs P0722 or P0723.
No MAF DTCs P0101, P0102, or P0103.
No MAP DTCs P0106, P0107, or P0108.
Engine speed is greater than 400 RPM.