U0137
Systeem
Network (CAN Bus)
Scanner vereist
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Lost Communication with Trailer Brake Control Module

Understand U0137, common causes, and the right FOXWELL scanner to diagnose it.

Integrated trailer brake controller module offline on trucks and SUVs with factory tow packages.

Veelvoorkomende symptomen

  • Trailer brakes inop
  • Tow package warning

Typische oorzaken

  • Failed trailer brake module
  • CAN wiring to dash controller
  • Aftermarket trailer wiring shorting bus

Welke scanner heb je nodig?

Full-system scanner (engine, ABS, SRS, transmission, service resets)

Gebruik live data en freeze frame voordat je onderdelen vervangt. ABS-, SRS- en U-codes vereisen meestal een full-system scanner.

Diagnosetips

  • Leg freeze frame vast wanneer de code voor het eerst verschijnt
  • Wis de code pas na het oplossen van de oorzaak
  • Controleer op gerelateerde pending codes
  • Controleer of accuspanning boven 12,4 V is voordat je sensoren suspecteert

Aanbevolen FOXWELL scanners

Veelgestelde vragen

Can I diagnose U0137 with a basic code reader?
U0137 may set in the engine module, but related diagnostics often benefit from an enhanced or full-system scanner with live data and freeze frame.
Is it safe to drive with U0137?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.