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P2220
System
Powertrain (Diesel Emissions)
Benötigter Scanner
Full-system scanner (engine, ABS, SRS, transmission, service resets)

NOx Sensor Current Low (Bank 1 Sensor 1)

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

NOx sensor cell current below expected range.

Häufige Symptome

  • False SCR efficiency codes
  • Check engine light

Typische Ursachen

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

Welchen Scanner brauchen Sie?

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

Nutzen Sie Live-Daten und Freeze Frame, bevor Sie Teile tauschen. ABS-, SRS- und U-Codes erfordern meist einen Vollsystem-Scanner.

Diagnose-Tipps

  • Freeze Frame erfassen, wenn der Code erstmals gesetzt wird
  • Code erst nach Behebung der Ursache löschen
  • Auf verwandte pending codes prüfen
  • Batteriespannung über 12,4 V prüfen, bevor Sie Sensoren verdächtigen

Empfohlene TOPDON Scanner

Häufig gestellte Fragen

What does P2220 mean?
P2220 indicates nox sensor current low (bank 1 sensor 1). NOx sensor cell current below expected range.
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.
Which TOPDON scanner do I need for P2220?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
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.