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P2205
System
Powertrain (Diesel Emissions)
Scanner som krävs
Full-system scanner (engine, ABS, SRS, transmission, service resets)

NOx Sensor Heater Control Circuit Low (Bank 1 Sensor 1)

Understand P2205, common causes, and the right TOPDON scanner to diagnose it.

NOx sensor heater circuit low — sensor inactive until warmed.

Vanliga symptom

  • SCR inactive on cold start
  • NOx readings invalid until warm

Typiska orsaker

  • Failed heater in NOx probe
  • Short to ground
  • Blown fuse for NOx heater

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 P2205 mean?
P2205 indicates nox sensor heater control circuit low (bank 1 sensor 1). NOx sensor heater circuit low — sensor inactive until warmed.
Can I diagnose P2205 with a basic code reader?
P2205 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 P2205?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with P2205?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.