Zoeken
U0157
Systeem
Network (CAN Bus)
Scanner vereist
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.

Veelvoorkomende symptomen

  • No-start
  • Security light flashing

Typische oorzaken

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

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 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.