Zoeken
C0221
Systeem
Chassis (ABS / Stability)
Scanner vereist
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Right Front Wheel Speed Sensor Signal Missing

Understand C0221, common causes, and the right TOPDON scanner to diagnose it.

No signal from the right front wheel speed sensor — ABS cannot monitor that wheel.

Veelvoorkomende symptomen

  • ABS light
  • Traction control off
  • May set with C0033/C0040

Typische oorzaken

  • Open sensor circuit
  • Failed sensor
  • Broken tone ring
  • Hub bearing damage affecting sensor gap

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 C0221 mean?
C0221 indicates right front wheel speed sensor signal missing. No signal from the right front wheel speed sensor — ABS cannot monitor that wheel.
Can I diagnose C0221 with a basic code reader?
C0221 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 C0221?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with C0221?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.