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scionking
scionking, MASTER CERTIFIED
Category: Lexus
Satisfied Customers: 469
Experience:  5 YRS EXP. ASE MASTER CERTIFIED/ TOYOTA MASTER CERTIFIED
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Aif sensor bad i change 3 of them its still showing its bad,

Customer Question

aif sensor bad i change 3 of them its still showing its bad
JA: Which particular sensor are you asking about? And have any trouble codes been triggered?
Customer: p1155
JA: What is the model/year of your Lexus?
Customer: 2002 rx 300
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: i try but i have no idea whats wrong with new sensor
JA: Anything else you think the mechanic should know?
Customer: idk
Submitted: 8 months ago.
Category: Lexus
Expert:  scionking replied 8 months ago.

Hello and welcome to Just Answer, my name is ***** ***** I start by asking some questions to better understand the situation?

Customer: replied 8 months ago.
What's wrong with the p1155
Expert:  scionking replied 8 months ago.

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.

Customer: replied 8 months ago.
I get this sensor it's was bad I get same sensor it's still p1155 today I get another one when I put in place my check engine light comes at 30 sec
Expert:  scionking replied 8 months ago.

Please answer my question, is this the one next to the radiator that your replacing?

Customer: replied 8 months ago.
Expert:  scionking replied 8 months ago.

What is the brand of sensor you are using for a replacement?

Customer: replied 8 months ago.
It's aftermarket (2)
And today I get on he said it's oem
but it's no working
Expert:  scionking replied 8 months ago.

Is it a Denso brand sensor?

Customer: replied 8 months ago.
No
Expert:  scionking replied 8 months ago.

Do you have a multimeter for measuring Ohms?

Expert:  scionking replied 8 months ago.

Hello??

Expert:  scionking replied 8 months ago.

Are you still there?

Customer: replied 8 months ago.
I'm find ohmmeter
Expert:  scionking replied 8 months ago.

o ok

Customer: replied 8 months ago.
Do you know what numbers must be in ohms
Expert:  scionking replied 8 months ago.

So measuring across the sensor( should be the two black wires on sensor) with sensor disconnected from the harness, 0.8 -1.4 ohms

Expert:  scionking replied 8 months ago.

Does the sensor measure with in spec?

Customer: replied 8 months ago.
They show me some random numbers every time different number
Expert:  scionking replied 8 months ago.

Check the batteries in the meter

Customer: replied 8 months ago.
It's new one
Customer: replied 8 months ago.
Maby.i my meter bad
Expert:  scionking replied 8 months ago.

should be a steady reading close to that number, what are the wire colors you have on the sensor? There should be 4 wires

Customer: replied 8 months ago.
2 black white and blue
Expert:  scionking replied 8 months ago.

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.

Expert:  scionking replied 8 months ago.
Expert:  scionking replied 8 months ago.
Expert:  scionking replied 8 months ago.
Expert:  scionking replied 7 months ago.