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U0122
Systeem
Network (CAN Bus)
Scanner vereist
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Lost Communication with Vehicle Dynamics Control Module

Understand U0122, common causes, and the right TOPDON scanner to diagnose it.

Stability/yaw control module offline — ESC and ABS may be disabled.

Veelvoorkomende symptomen

  • ESC off light
  • ABS light
  • Handling warning

Typische oorzaken

  • VDC module fault
  • Wheel speed sensor cascade
  • CAN bus off

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 U0122 mean?
U0122 indicates lost communication with vehicle dynamics control module. Stability/yaw control module offline — ESC and ABS may be disabled.
Can I diagnose U0122 with a basic code reader?
U0122 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 U0122?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with U0122?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.