ok , a few weeks back i was gettin codes for knock sensor and front 02 sensor. I changed the 02 sensor today and now im gtetting the code for Upstream oxygen sensor heater fault(right bank) witch one is this, is it the same one i just changed or is it something diffrent?, i need help please!!

 

This is the one by the passenger firewall. It's near the oil pressure switch. This is NOT the one by the radiator.

 

im not to fimiliar with these things, can you be more spacific?, and how much is this gona cost me?

is the second sensor in the y-pipe or is this not a sensor at all but some sensor heater thing???

 

free bump to self

just went for a ride and checked codes and knock sensor code is back!!. Can the knock sensor be causeing the o2 sensor code?

 

No. If you replaced the O2 sensor then you know where the plug goes. Or did you just solder in the new sensor? Check the connection. You probably just need to change the other sensor.

 

wel i called the dealer ship and they guy said i changed the correct one. I double checked all the connections and plugs to.

The Upstream oxygen sensor heater fault(right bank) is the senser closest to the front of the car, correct??

 

i believe so.

 

check it...

Maxima O2 sensor diagram

 

that doesn't even help a bit.

 

Like I said, the one you changed is NOT the correct one. If you look on this link http://www.courtesyparts.com/A32_O2-sensors.html the one closest to the front (near the radiator) is the LEFT sensor. The RIGHT bank sensor is the one by the oil pressure switch, http://www.motorvate.ca/mvp.php/514 (near the oil filter area)

 

Yes it does. It tells you which one is the LH (Left Hand) side and the RH (Right Hand) side

 

yeah, that helps A LOT.

 

thanks guys but i wish i new this earlier ,
kindoff a dumb question but are the sensors interchangeable sense the one i changed isn't borken.

 

if the part number on the diagram is the same, obviously they are interchangeable.

 

nope the last diget is a 8 on one and a 9 on the other, im gona try to rig something up tho sense i got nuthin to loose.

 

I just looked and the numbers are different. I suspect the difference is in the length of the wire, or in the shape of the connector . Be prepared to splice the wires.

 

The sensors are the same (look on http://www.oxygensensors.com), the only difference is the length of the wire. The ones you buy from a Nissan dealer have a perfect length so the wire isn't dragging somewhere. One wire is shorter than the other (so 2 different part numbers). The ones you buy from http://www.oxygensensors.com are the ones with the long wire so they would fit in both places (one wire might be dragging, not sure)

 

ya thats what i kinda figured, tomoro im gona spice the wires with the broken one with the sensor i took out today sense it is still good. I realy got nuthing to loose cause the sensor i have is usless and the one in the car is broken.

 

a simple tie wrap will take care of the wire hanging loose

 

draging is the least of my worries. I just want the code to go away.

 

****UPDATE*****

ok , i changed the sensor today without even having to do any spilcing and everything fit perfect. Problem is im still getting the same codes for the right bank sensor and the knock sensor. So now im thinkin my knock sensor is causing both codes.

Also i have an air fuel gauge, it used to bounce around, now it stays at stoich and goes to lean at high rpms. is this normal?

 

After you replaced the sensor, did you reset the CEL?

 

Yup, then i went for a ride and did it again and its still throwin codes.

 

Dude, do you need me to come to your HOUSE and fix this ish? Its not hard, it costs 60 bucks to change an o2 sensor...I EVEN Have an EXTRA OEM sensor for you... Let me know if you need help

 

You replaced the one halfway down the y pipe, not the one closest to the front of the car, right? You didn't bust the sensor installing it, did you? I once sprayed WD40 on a 02 sensor trying to screw it in, and I think that screwed it up? There were no visible signs of damage, but I kept getting the code. I bought a new sensor, installed it with antiseize, and that fixed it.

 

no i changed the right one, it did bang around on the floor alittle but i dont think it messed it up, alot of people are tellin me its cause of my knock sensor.Cause im getting both codes. So im gona have kyle help me change it and hopefully all my codes wil go away.

 

The other thing is my friend said my air fuel gage is werking correctly. it stays at stoich and goes to lean at high rpm, is this how its suposesed to be?

 

thos a.f gauges suck... PERIOD

 

Ya i know, i only got it cause i got it for real cheap with the pod. Its sad i dont how it works yet.

 

Make sure you have premium fuel in your tank and do the knock sensor resistor mod and see if that solves your problem. If it does, then your KS is bad. If it doesn't, then the KS is still good and there might still be a problem with the O2 sensor.

 

If it doesn't come with its own wide-band O2 sensor it is USELESS...

 

Another kinda stuid question, can my 02 sensor be reading wrong because of my high flow cat, this is what my frined is tellin me but he has a honda so who knows. what do you guys think?

 

According to the Nissan FSM, if an 02 sensor is dropped from a height of over 8" (something like that), it's to be replaced. 02 sensors are very fragile.

Also, the knock sensor will NOT throw 02 sensor codes. Only failing 02 sensors throw o2 sensor and knock sensor codes. If the knock sensor code is thrown by itself, then it's a problem with the knock sensor or harness.


Dave

 

Nope. I have a high flow cat (which does nothing) and my 7 year old OEM sensor reads just fine. Confirmed with my OBD Scan plotting software.


Dave

 

damm i think im gona buy another 02 sensor now cause of it banging around with my tools and on the floor.
The weird thing is i think i had the knock sensor code and then later got the 02 code. Im gona change the knock sensor sence i already bought it a while ago and see what happens.