Conditions for Running the DTC

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

P0877 or P0878

DTCs P0711, P0712, P0713, P0973, P0974, P0976, P0977, P1915, or P182E are not set.
Ignition voltage is 8.6 volts or greater.
The transmission fluid temperature (TFT) is 0-120°C (32-248°F).
Engine speed is 500 RPM or greater for 5 seconds.