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U0108
Systeem
Network (CAN Bus)
Scanner vereist
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Lost Communication with Alternative Fuel Control Module

Understand U0108, common causes, and the right TOPDON scanner to diagnose it.

Alternative fuel (CNG/LPG) control module not communicating.

Veelvoorkomende symptomen

  • Engine won't run on alt fuel
  • Warning lights

Typische oorzaken

  • Failed alt fuel module
  • CAN fault
  • Empty or switched fuel system

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 U0108 mean?
U0108 indicates lost communication with alternative fuel control module. Alternative fuel (CNG/LPG) control module not communicating.
Can I diagnose U0108 with a basic code reader?
U0108 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 U0108?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with U0108?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.