matthewlsw

2003 RX300. Got the trouble code for the Heated O2 Sensor (Bank 1 Sensor 2). Lexuspartsnow.com says I need part number

89465-49075
http://www.lexuspartsnow.com/parts/l...465-49075.html



I believe them so I bought the same exact part from Amazon even though their site says it doesn't fit, thinking the Lexus site will know better.


Got it installed fine and cleared the codes but the code keeps coming up every time I clear it. Did I just waste $140? Why would one site list it as fitting and the other doesn't? Could it potentially be another issue?

fastnoypi

welcome..what was the exact code or list of codes when you had the original CEL showing up?

matthewlsw

I will have to go grab the code again at lunch, but my device said "Heated Oxygen Sensor Bank 1 Sensor 2" and that was the only trouble code

fastnoypi

some codes that come up could be false positives especially if there are multiple codes displayed. However, there might be a problem with your B1 catalytic converter. Are you experiencing oil consumption? If so, runners off the rear manifold flow to the B1 catalyitic and unburnt oil might be clogging it.

I would first try a long sustained drive to get the catalytic converters nice and hot and see if the code clears itself.

matthewlsw

Ok I will try going on an hour drive sometime soon. And just because I forgot to mention it, the check engine and VSC lights are on

matthewlsw

Another thought: do you think it could be the circuit back to the ECU causing the issue? And if so, how could I check it?

Also, I'm attaching a photo with the exact trouble code

fastnoypi

you should have posted the code to begin with. p0155 is bank 2 sensor 1. You bought the wrong o2 sensor. It calls for the type before the catalytic converter.

matthewlsw

This diagram shows it has bank 1 sensor 2

I got it from this thread https://www.clublexus.com/forums/rx-...el-sensor.html

And this is where I found the part number for it http://www.lexuspartsnow.com/parts-l...rs=89465-49075

fastnoypi

let me get back to you, i will verify my manual for location. in either case it should be pointed to an O2 sensor pre-cat.

Edit: OBD2 report codes are standard. p0155 is universally bank2 sensor 1. Top of your front manifold.

carguy07

This worked perfect for me:

salimshah

The attached pic should only show Sensor 2 [there is no bank implication as it is after the Y].

Salim

carguy07

This

rosen71

I got 2 of these.
Both error codes were gone after replacement.

fastnoypi

pre-cat o2 sensors for b1s1 and b2s1

matthewlsw

Alright I ordered 2 of those a/f sensors. Thanks all for helping out a newbie! I'll post again with the results after they ship and I install them