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U0420
Systeem
Network (CAN Bus)
Scanner vereist
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Invalid Data Received from Power Steering Control Module

Understand U0420, common causes, and the right TOPDON scanner to diagnose it.

Power steering module sending implausible angle or torque data.

Veelvoorkomende symptomen

  • Steering warning
  • ESC disabled

Typische oorzaken

  • PS sensor fault
  • Rack actuator issue
  • Module calibration lost

Welke scanner heb je nodig?

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

Gebruik live data en freeze frame voordat je onderdelen vervangt. ABS-, SRS- en U-codes vereisen meestal een full-system scanner.

Diagnosetips

  • Leg freeze frame vast wanneer de code voor het eerst verschijnt
  • Wis de code pas na het oplossen van de oorzaak
  • Controleer op gerelateerde pending codes
  • Controleer of accuspanning boven 12,4 V is voordat je sensoren suspecteert

Aanbevolen TOPDON scanners

Veelgestelde vragen

What does U0420 mean?
U0420 indicates invalid data received from power steering control module. Power steering module sending implausible angle or torque data.
Can I diagnose U0420 with a basic code reader?
U0420 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 U0420?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with U0420?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.