Sök
U0122
System
Network (CAN Bus)
Scanner som krävs
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.

Vanliga symptom

  • ESC off light
  • ABS light
  • Handling warning

Typiska orsaker

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

Vilken scanner behöver du?

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

Använd live-data och freeze frame innan du byter delar. ABS-, SRS- och U-koder kräver oftast en fullsystems-scanner.

Diagnostiktips

  • Spara freeze frame när koden först sätts
  • Rensa koden först efter att orsaken är åtgärdad
  • Kontrollera relaterade väntande koder
  • Verifiera batterispänning över 12,4 V innan du misstänker sensorer

Rekommenderade TOPDON-scannrar

Vanliga frågor

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.