P2220
Sistema
Powertrain (Diesel Emissions)
Escáner necesario
Full-system scanner (engine, ABS, SRS, transmission, service resets)

NOx Sensor Current Low (Bank 1 Sensor 1)

Understand P2220, common causes, and the right FOXWELL scanner to diagnose it.

NOx sensor cell current below expected range.

Síntomas habituales

  • False SCR efficiency codes
  • Check engine light

Causas típicas

  • Aging NOx sensor
  • Contamination on probe
  • Exhaust leak before sensor

¿Qué escáner necesita?

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

Use datos en vivo y freeze frame antes de cambiar piezas. Códigos ABS, SRS y U suelen requerir un escáner de todos los sistemas.

Consejos de diagnóstico

  • Registre el freeze frame cuando se active el código
  • Borre el código solo tras corregir la causa
  • Revise códigos pendientes relacionados
  • Verifique que la batería esté por encima de 12,4 V antes de sospechar sensores

Escáneres FOXWELL recomendados

Preguntas frecuentes

Can I diagnose P2220 with a basic code reader?
P2220 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 P2220?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.