Zoeken
U0143
Systeem
Network (CAN Bus)
Scanner vereist
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Lost Communication with Body Control Module C

Understand U0143, common causes, and the right TOPDON scanner to diagnose it.

Third BCM on the network offline — lighting, locks, or accessory functions affected.

Veelvoorkomende symptomen

  • Random electrical faults
  • Multiple U-codes

Typische oorzaken

  • Failed BCM
  • CAN backbone damage
  • Water intrusion

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 U0143 mean?
U0143 indicates lost communication with body control module c. Third BCM on the network offline — lighting, locks, or accessory functions affected.
Can I diagnose U0143 with a basic code reader?
U0143 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 U0143?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with U0143?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.