Lexus Troubleshooting Questions? Ask a Lexus Expert
Hello and welcome to Just Answer, my name is ***** ***** I start by asking some questions to better understand the situation?
P1155 is for bank 2 sensor 1, this is the one located next to the radiator, is this the one you replace? Have you replaced this sensor three times in a row or you have replaced all 3 a/f and 02 sensors on the vehicle.
Please answer my question, is this the one next to the radiator that your replacing?
What is the brand of sensor you are using for a replacement?
Is it a Denso brand sensor?
Do you have a multimeter for measuring Ohms?
Are you still there?
So measuring across the sensor( should be the two black wires on sensor) with sensor disconnected from the harness, 0.8 -1.4 ohms
Does the sensor measure with in spec?
Check the batteries in the meter
should be a steady reading close to that number, what are the wire colors you have on the sensor? There should be 4 wires
Yes the 2 blacks are for the heater, this is what the code is for the heater. I would check with another meter, if it is not between 0.8 and 1.4 this is why the light is coming on. I only recommend the Denso sensors, the other brands do not work right with these cars period. You can get the Denso brand ones from Autozone and Advance Auto.