Sök
P2204
System
Powertrain (Diesel Emissions)
Scanner som krävs
Full-system scanner (engine, ABS, SRS, transmission, service resets)

NOx Sensor Circuit Low Input (Bank 2 Sensor 1)

Understand P2204, common causes, and the right TOPDON scanner to diagnose it.

Bank 2 upstream NOx sensor circuit low.

Vanliga symptom

  • SCR codes
  • Check engine light

Typiska orsaker

  • Failed bank 2 NOx sensor
  • Wiring short
  • Exhaust leak affecting 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 P2204 mean?
P2204 indicates nox sensor circuit low input (bank 2 sensor 1). Bank 2 upstream NOx sensor circuit low.
Can I diagnose P2204 with a basic code reader?
P2204 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 P2204?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with P2204?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.