Sök
U0120
System
Network (CAN Bus)
Scanner som krävs
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.

Vanliga symptom

  • Heavy steering
  • EPS warning
  • Stability control affected

Typiska orsaker

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

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 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.