Conditions for Running the DTC

WARNING: This page is about a different car, the 2011 GMC Yukon, 2011 Chevrolet Tahoe, and 2011 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.

P0A81

The ignition is ON.
Battery voltage is 9-18 V.
The fan speed is commanded 35 percent or greater.

P0BC1

The ignition is ON.
Battery voltage is 9-18 V.
The fan has transitioned from either ON to OFF or from OFF to ON.