P1155
System
Powertrain (Emissions)
Scanner som krävs
Enhanced OBD2 scanner (live data graphs, freeze frame, battery voltage test)

Air/Fuel Sensor Heater Circuit (Bank 2 Sensor 1)

Understand P1155, common causes, and the right FOXWELL scanner to diagnose it.

Bank 2 wide-range A/F sensor heater circuit fault — Toyota/Lexus common on V6 engines.

Vanliga symptom

  • Check engine light
  • Poor fuel trim bank 2
  • Failed emissions

Typiska orsaker

  • Failed A/F sensor heater
  • Blown fuse
  • Wiring in exhaust manifold area
  • Exhaust leak near sensor

Vilken scanner behöver du?

Enhanced OBD2 scanner (live data graphs, freeze frame, battery voltage test)

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 FOXWELL-scannrar

Vanliga frågor

Can I diagnose P1155 with a basic code reader?
P1155 may set in the engine module, but related diagnostics often benefit from an enhanced or full-system scanner with live data and freeze frame.
Is it safe to drive with P1155?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.