Lexus Troubleshooting Questions? Ask a Lexus Expert
Is this the only code that is ever been set? Or are you getting a code for the other sensor also? If you clear this code is it the only one that ever comes back each time?
Okay this P1155 code indicates the heater circuit within the air fuel ratio sensor for bank two has failed. The sensor is relatively easy to replace it is located right there in the exhaust manifold for bank two by the radiator. If you break the sensor Loose and it starts to freeze up do not force it get brake fluid and put it at the base of the sensor on the threads and allow it to set for about five minutes work the sensor back and forth and it will come right out. It is not necessary to replace the other air fuel ratio sensor. Please do not forget to rate The assistance that I have provided at three or higher and if you need additional assistance feel free to reply and I will get back to you.