Question about 2000 Lexus RX 300
P1150 Air/Fuel sensor circuit (bank 2 sensor 1)
P1155 Air/Fuel sensor heater malfunction (bank 2 sensor1)
There are a few quite a few reasons why this problem is present.
The car is 10years old, probably has between 100k and 200k miles.
I would guess that the sensor is bad and needs to be replaced. But you do want to look at other aspects of the car. I'm not there so you will need to find and confirm if the car needs a tune-up, if there is water in the fuel, if there is something else wrong with the exhaust system (like the CAT).
Also the wiring would need to be inspected to see if there are corroded, bent, or missing pins.
I will tell you that without a good scan-tool, you will either luck-out with changing the A/F sensors or you will be playing the guessing game for days. Good luck, but let me know if you have more questions.
Posted on May 12, 2010
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Posted on Jan 02, 2017
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