P1155
Sistema
Powertrain (Emissions)
Escáner necesario
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.

Síntomas habituales

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

Causas típicas

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

¿Qué escáner necesita?

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

Use datos en vivo y freeze frame antes de cambiar piezas. Códigos ABS, SRS y U suelen requerir un escáner de todos los sistemas.

Consejos de diagnóstico

  • Registre el freeze frame cuando se active el código
  • Borre el código solo tras corregir la causa
  • Revise códigos pendientes relacionados
  • Verifique que la batería esté por encima de 12,4 V antes de sospechar sensores

Escáneres FOXWELL recomendados

Preguntas frecuentes

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.