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U0120
System
Network (CAN Bus)
Benötigter Scanner
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Lost Communication with Electric Power Steering (EPAS) Module

Understand U0120, common causes, and the right TOPDON scanner to diagnose it.

Electric power steering module not on the network — steering assist may be lost.

Häufige Symptome

  • Heavy steering
  • EPS warning
  • Stability control affected

Typische Ursachen

  • Failed EPAS module
  • CAN wiring to steering rack
  • Low battery
  • Blown EPS fuse

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 U0120 mean?
U0120 indicates lost communication with electric power steering (epas) module. Electric power steering module not on the network — steering assist may be lost.
Can I diagnose U0120 with a basic code reader?
U0120 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 U0120?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with U0120?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.