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U0104
System
Network (CAN Bus)
Scanner som krävs
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Lost Communication with Cruise Control Module

Understand U0104, common causes, and the right TOPDON scanner to diagnose it.

Adaptive or conventional cruise control module offline.

Vanliga symptom

  • Cruise inoperative
  • ACC warning
  • Check engine or other lights

Typiska orsaker

  • Failed cruise module
  • CAN wiring
  • Radar sensor fault on ACC systems
  • Low voltage

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 U0104 mean?
U0104 indicates lost communication with cruise control module. Adaptive or conventional cruise control module offline.
Can I diagnose U0104 with a basic code reader?
U0104 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 U0104?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with U0104?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.