ok this thread was started here 1st.
http://forums.maxima.org/showthread.php?t=249171

my front and rear passenger side o2 sensers were changed a month ago by dealer. today they changed the front drivers side for no cost because this was the 3rd time i brought it to them. the 1st 2 times it was covered by extended warranty so those were free too.
I wanted them to change the 4th one too because i was afraid that i was going to come back again and have the 4th one changed very soon, but she didnt do it cuz she said that she cant do it unless ecu shows that its bad. anyways i heard the following words come out of her mouth "dont worry you will most likely not going to come back, we just did lots of test and checked the whole car out, the 4th one is functioning properly". my car was there for 3 hours, i saw it go up in air and mechanic work on it but the words that came out of the ladies mouth make me suspicious, when she said that i was not going to come back. is it possible that they havent changed the bad o2 sensor and somehow fooled the ecu to detect it as a good o2 sensor? my cel is off right now and i see it turn on for 2 sec when i turn they key to ON position.

And also the vibration problem that i had is still there and i dont feel ANY difference with new o2 sensor at all, what so ever. so u guys think they changed it? or fooled the ecu if thats possible. my warranty is expired and the fact that this time it was free and the words that came out of her mouth make me VERY suspicous. how can i tell if they changed it?
thanks

 

4th o2 sensor? My '96 only hs 3 that I'm aware of...

 

umm, i belive there are 4

 

Maybe she was joking with you... she knew the 4th phantom o2 wasnt going to throw any codes to the ECU .... LOL

 

It's a Cali spec car

I guess if you want to check, go under your car and pull out the sensor. Then compare it to a new or an old used up one Or unplug it and turn on your car. If the CEL comes on, then the sensor is good. If it's unplugged and no CEL then your ECU is not picking it up.

Good Luck!

 

thanks for clearing that up jatan. i was about to but then i saw your post. do you still visit motorvate? i'm "nissanhead" on the motorvate board.

 

I visit it sometimes, mostly during school. After school, I go somewhere with my friends or just drive around. Then I come home and do homework. Go online for a little while and go to sleep. Not much free time left Need to go look for a part job in a few weeks so I can buy mods My car needs me!

 

i agree definately do this and then report back, something tells me ur car might have a bad knock sensor, do you know how to check for codes? check and see if u have an 0304 code

 

what would a vibration have to do with a bad 02 sensor?

 

yes i do know how to check them. but i think i broke my ecu because it doesnt go against a stop when turning it to the right or left.

and i cant do what he told me lol because of the following reasons:

1) cant lift car up
2) dunno wtf an o2 sensor looks like
3) dunno where it is located at
4) dunno how to unplug it
5) dont have tools
yea u gussed it, im a

 

http://www.courtesyparts.com/A32_O2-sensors.html