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P2204
Systeem
Powertrain (Diesel Emissions)
Scanner vereist
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.

Veelvoorkomende symptomen

  • SCR codes
  • Check engine light

Typische oorzaken

  • Failed bank 2 NOx sensor
  • Wiring short
  • Exhaust leak affecting sensor

Welke scanner heb je nodig?

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

Gebruik live data en freeze frame voordat je onderdelen vervangt. ABS-, SRS- en U-codes vereisen meestal een full-system scanner.

Diagnosetips

  • Leg freeze frame vast wanneer de code voor het eerst verschijnt
  • Wis de code pas na het oplossen van de oorzaak
  • Controleer op gerelateerde pending codes
  • Controleer of accuspanning boven 12,4 V is voordat je sensoren suspecteert

Aanbevolen TOPDON scanners

Veelgestelde vragen

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.