C0221
Système
Chassis (ABS / Stability)
Scanner requis
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Right Front Wheel Speed Sensor Signal Missing

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

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

Symptômes courants

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

Causes typiques

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

Quel scanner choisir ?

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

Utilisez les données en direct et le freeze frame avant de remplacer des pièces. Les codes ABS, SRS et U nécessitent souvent un scanner mult systèmes.

Conseils de diagnostic

  • Enregistrez le freeze frame lors de la première apparition du code
  • Effacez le code uniquement après avoir corrigé la cause
  • Vérifiez les codes en attente associés
  • Vérifiez que la batterie est au-dessus de 12,4 V avant de suspecter un capteur

Scanners FOXWELL recommandés

Questions fréquentes

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.
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.