Szukaj
U0142
System
Network (CAN Bus)
Wymagany skaner
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.

Typowe objawy

  • Random electrical gremlins
  • Door lock issues
  • Lighting faults

Typowe przyczyny

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

Jakiego skanera potrzebujesz?

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

Użyj danych na żywo i freeze frame przed wymianą części. Kody ABS, SRS i U zwykle wymagają skanera full-system.

Wskazówki diagnostyczne

  • Zapisz freeze frame, gdy pojawi się kod
  • Kasuj kod dopiero po usunięciu przyczyny
  • Sprawdź powiązane kody pending
  • Sprawdź, czy napięcie akumulatora jest powyżej 12,4 V przed podejrzeniem czujników

Polecane skanery TOPDON

Często zadawane pytania

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.