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Diagnostic Trouble Code (DTC) Chart: Notes

WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods .

Diagnostic Trouble Code Chart 

Module DTC Description Action
TBM B148A:11 Trailer Brake Output: Circuit Short To Ground GO to Pinpoint Test C 
TBM B148A:12 Trailer Brake Output: Circuit Short To Battery GO to Pinpoint Test C 
TBM B148B:2A Trailer Brake Manual Slider: Stuck in Range GO to Pinpoint Test H 
TBM B148B:49 Trailer Brake Manual Slider: Internal Electronic Failure GO to Pinpoint Test H 
TBM B148C:2A Trailer Brake Gain Button: Stuck in Range GO to Pinpoint Test H 
TBM U064D:08 Lost Communication with Trailer Brake Control Switch: Bus Signal/Message Failures GO to Pinpoint Test H 
TBM U3000:12 Control Module: Circuit Short To Battery GO to Pinpoint Test C 
TBM U3000:1C Control Module: Circuit Voltage Out Of Range GO to Pinpoint Test C 
TBM U3000:1D Control Module: Circuit Current Out Of Range GO to Pinpoint Test C 
TBM U3003:16 Battery Voltage: Circuit Voltage Below Threshold GO to Pinpoint Test I 
TBM U3003:17 Battery Voltage: Circuit Voltage Above Threshold GO to Pinpoint Test J 
TBM U3008:13 Control Module Ground "A": Circuit Open GO to Pinpoint Test K