Sök
U0143
System
Network (CAN Bus)
Scanner som krävs
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.

Vanliga symptom

  • Random electrical faults
  • Multiple U-codes

Typiska orsaker

  • Failed BCM
  • CAN backbone damage
  • Water intrusion

Vilken scanner behöver du?

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

Använd live-data och freeze frame innan du byter delar. ABS-, SRS- och U-koder kräver oftast en fullsystems-scanner.

Diagnostiktips

  • Spara freeze frame när koden först sätts
  • Rensa koden först efter att orsaken är åtgärdad
  • Kontrollera relaterade väntande koder
  • Verifiera batterispänning över 12,4 V innan du misstänker sensorer

Rekommenderade TOPDON-scannrar

Vanliga frågor

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.