P1155
Systeem
Powertrain (Emissions)
Scanner vereist
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.

Veelvoorkomende symptomen

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

Typische oorzaken

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

Welke scanner heb je nodig?

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

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 FOXWELL scanners

Veelgestelde vragen

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.