What does code P1135 mean on Lexus vehicles?
The heater circuit of the air/fuel ratio sensor on bank 1 sensor 1 has malfunctioned, affecting sensor warm-up.
OBD-II Code Lexus
P1135 — Lexus — Air/Fuel Ratio Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
The heater circuit of the air/fuel ratio sensor on bank 1 sensor 1 has malfunctioned, affecting sensor warm-up.
Common symptoms
- Check engine light
- poor cold start performance
Possible causes
- Heater element failure
- blown fuse
- wiring fault
Initial recommendation
Inspect heater circuit, fuses and wiring, replace sensor if necessary.
Safety notice
This information is for guidance only. Brand-specific codes may vary by model, year, engine, transmission and vehicle configuration. It does not replace a physical inspection or diagnosis by a qualified mechanic. If the vehicle is unsafe to operate, avoid driving it and seek professional inspection.
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