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U0104
System
Network (CAN Bus)
Benötigter Scanner
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.

Häufige Symptome

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

Typische Ursachen

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

Welchen Scanner brauchen Sie?

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

Nutzen Sie Live-Daten und Freeze Frame, bevor Sie Teile tauschen. ABS-, SRS- und U-Codes erfordern meist einen Vollsystem-Scanner.

Diagnose-Tipps

  • Freeze Frame erfassen, wenn der Code erstmals gesetzt wird
  • Code erst nach Behebung der Ursache löschen
  • Auf verwandte pending codes prüfen
  • Batteriespannung über 12,4 V prüfen, bevor Sie Sensoren verdächtigen

Empfohlene TOPDON Scanner

Häufig gestellte Fragen

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.