U0157
System
Network (CAN Bus)
Wymagany skaner
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Lost Communication with Immobilizer Control Module

Understand U0157, common causes, and the right TOPDON scanner to diagnose it.

Immobilizer module not communicating — no-start possible.

Typowe objawy

  • No-start
  • Security light flashing

Typowe przyczyny

  • Failed immobilizer
  • Key not recognized
  • CAN wiring
  • Security module water damage

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 U0157 mean?
U0157 indicates lost communication with immobilizer control module. Immobilizer module not communicating — no-start possible.
Can I diagnose U0157 with a basic code reader?
U0157 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 U0157?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with U0157?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.