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P2201
Systeem
Powertrain (Emissions)
Scanner vereist
Full-system scanner (engine, ABS, SRS, transmission, service resets)

NOx Sensor Circuit Range/Performance (Bank 1)

Understand P2201, common causes, and the right TOPDON scanner to diagnose it.

NOx sensor out of range on diesel or lean-burn gasoline SCR systems.

Veelvoorkomende symptomen

  • Check engine light
  • SCR warning on commercial diesel

Typische oorzaken

  • Failed NOx sensor
  • DEF quality issue on SCR
  • Exhaust leak before 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 P2201 mean?
P2201 indicates nox sensor circuit range/performance (bank 1). NOx sensor out of range on diesel or lean-burn gasoline SCR systems.
Can I diagnose P2201 with a basic code reader?
P2201 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 P2201?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with P2201?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.