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P2222
System
Powertrain (Diesel Emissions)
Scanner som krävs
Full-system scanner (engine, ABS, SRS, transmission, service resets)

NOx Sensor Current Low (Bank 2 Sensor 1)

Understand P2222, common causes, and the right TOPDON scanner to diagnose it.

Bank 2 NOx sensor current low.

Vanliga symptom

  • SCR warning
  • Emissions fail

Typiska orsaker

  • Failed bank 2 probe
  • Exhaust contamination
  • Wiring fault

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 P2222 mean?
P2222 indicates nox sensor current low (bank 2 sensor 1). Bank 2 NOx sensor current low.
Can I diagnose P2222 with a basic code reader?
P2222 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 P2222?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with P2222?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.