U0137
Sistema
Network (CAN Bus)
Scanner richiesto
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.

Sintomi comuni

  • Trailer brakes inop
  • Tow package warning

Cause tipiche

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

Quale scanner ti serve?

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

Usa dati live e freeze frame prima di sostituire componenti. I codici ABS, SRS e U richiedono spesso uno scanner mult sistema.

Consigli diagnostici

  • Registra il freeze frame quando il codice compare la prima volta
  • Cancella il codice solo dopo aver risolto la causa
  • Controlla i codici pending correlati
  • Verifica che la batteria sia sopra 12,4 V prima di sospettare un sensore

Scanner FOXWELL consigliati

Domande frequenti

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.