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U0120
Sistema
Network (CAN Bus)
Scanner richiesto
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.

Sintomi comuni

  • Heavy steering
  • EPS warning
  • Stability control affected

Cause tipiche

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

Di quale scanner hai bisogno?

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

Usa dati live e freeze frame prima di sostituire componenti. I codici ABS, SRS e U richiedono di solito uno scanner full-system.

Consigli diagnostici

  • Registra il freeze frame quando compare il codice
  • Cancella il codice solo dopo aver risolto la causa
  • Controlla codici pending correlati
  • Verifica che la batteria sia sopra 12,4 V prima di sospettare i sensori

Scanner TOPDON consigliati

Domande frequenti

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.