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Thread: Lexus 2001 RX300 oxygen sensor

  1. #1
    Join Date
    Feb 2009

    Default Lexus 2001 RX300 oxygen sensor

    Had code P1130: Circuit malfunction Bank 1 Sensor 1
    Replaced sensor with Universal Type Oxygen Sensor, 4 Wire, Heated, Part # OS-4000 from US AutoParts Network.
    Cleared codes with code reader.
    Now I get code P1155 Air/Fuel Ratio Sensor Heater Circuit Malfunction (Bank 1 Sensor 1).
    Any Ideas??

  2. #2
    Join Date
    Jan 2007


    Hi RLB LOE,

    Apparently the "universal" O2 sensor isn't compatible with your vehicle. Toyota and Lexus use the term "air-fuel ratio sensor" for the upstream O2 sensors. I would obtain the proper sensor, install it, clear the codes, and see what happens. Oh - first make sure you didn't damage any of the wiring connected to the sensor.

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