U0438

Invalid Data Received From Trailer Brake Control Module

DTC U0438, sometimes indicated as U043800 is an OBD diagnostic trouble code indicating a generic fault with the vehicle user network.

  • U0438: Invalid data received from trailer brake control module
  • U0438 00: Invalid data received from trailer brake control module
  • U0438 71: Invalid Data Received From Trailer Brake Control Module

DTC Trouble Code Search
Bulletins

Bulletins are notices put out by manufacturers in conjunction with the NHTSA to notify the public of manufacturing issues or changes.

  • SSM 52184 - ELECTRICAL SYSTEM
    FORD: Some 2023 f-150 hybrid vehicles built on 24-oct-2022 and through 26-oct-2022 equipped with a 3.5l power boost engine may exhibit dtc U0438:82 in the ipc and/or U0140:87 in the trm. This may also be accompanied by a trailer brake system faul
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