Sök
P2220
System
Powertrain (Diesel Emissions)
Scanner som krävs
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.

Vanliga symptom

  • False SCR efficiency codes
  • Check engine light

Typiska orsaker

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

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 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.