Sök
U0420
System
Network (CAN Bus)
Scanner som krävs
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.

Vanliga symptom

  • Steering warning
  • ESC disabled

Typiska orsaker

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

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 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.