B0091 3A

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.

The SDM has received an ID message from the front end sensor, which does not match the ID stored in the SDM memory.
The SDM has reset the front end sensor twice without detecting the correct ID message.