Zoeken
U0142
Systeem
Network (CAN Bus)
Scanner vereist
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Lost Communication with Body Control Module B

Understand U0142, common causes, and the right TOPDON scanner to diagnose it.

Secondary BCM not on network — lights, locks, or accessories may misbehave.

Veelvoorkomende symptomen

  • Random electrical gremlins
  • Door lock issues
  • Lighting faults

Typische oorzaken

  • Failed BCM
  • CAN wiring in dash
  • Water leak into BCM
  • Low voltage

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 TOPDON scanners

Veelgestelde vragen

What does U0142 mean?
U0142 indicates lost communication with body control module b. Secondary BCM not on network — lights, locks, or accessories may misbehave.
Can I diagnose U0142 with a basic code reader?
U0142 may set in the engine module, but related diagnostics often benefit from an enhanced or full-system scanner with live data and freeze frame.
Which TOPDON scanner do I need for U0142?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with U0142?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.