YACT: OMFG Car problems already

[Shawn]

The second one is probably located after the cat.

 

[Chiboy]

How do I find out which one of these is my car? My car is automatic but what is Non-Calif & how do I know if its mexico built or not...

L4-1.6L NON-Mexico built
L4-1.6L Japan built (Non-Calif.)
L4-1.6L Mexico built (Auto trans.)

Edit: Never mind its L4-1.6L Mexico built (Auto trans.)

 

[Shawn]

Check the inside the driver side door. Non-calif probably means one without the extra emission crap they put on in CA.

 

[dartworth]

Buy a service manual off ebay and RTFM:|

 

[bmacd]

Originally posted by: psteng19

Originally posted by: Chiboy
I only disconnected it for like a minute... There is more than 1 O2 Sensor? This is the 4cylinder car so I thought it only had one?

What does the number of cylinders have anything to do with the number of O2 sensors?

A '95 Sentra has 2 O2 sensors. One in the cat (positive) and another at the exhaust manifold (I believe).
Both of mine went bad (also '95 Sentra) but were very easy and cheap to replace.
I replaced both but never reset the ECU so my light still stays on.

different engines have different amount of sensors...for example. my v8 explorer has 4 sensors...two before the cat, and two after. The v6 explorer has only two sensors. I assume that was the logic he was using.

-=bmacd=-

 

Code retrieval and their meanings

Nissan's have two types of codes, hard codes (which have to be reset using a scanner or jumping pins on the datalink connector) or soft codes which can be erased by disconnecting the battery for at least 10 minutes.

1995 was the switch over year for most vehicle manufacturer's (regarding OBD I and OBD II), therefor there is no way for me to tell you offhand how many O2 sensors you have or how to correctly erase the trouble code(s).

 

[woowoo]

Originally posted by: Chiboy
how do I know if its mexico built or not...

Must resist.......

 

Go back to Autozone - you can reset the sensor using the OBDII device, and if there is indeed still a problem, the light will come back on.

 

[StageLeft]

Originally posted by: Chiboy
My car has 2 Sensors, the second located under the car. Now I need to replace that & all should be well. I looked every where for No. 2 rear sensor. I guess I have to go to the dealer 🙁

Exact location:

UNDER VEHICLE, CENTER, BELOW SEATING AREA, NEXT TO CATALYTIC CONVERTER, MOUNTED ON EXHAUST PIPE

Well, if you go to autozone and get a code again for an O2 sensor just identify which one it is. It's entirely possible that you replaced a good front with a new front, needlessly, but you could hopefully get that money back, although it may have gone some time anyway 🙂

The rear one is actually easier to find than the front one - at least on my maximas. On my 93 sentra the front O2 sensor was easy to find. The rear one is underneath the car. You'll probably need to jack it up/ramps/drive on a curb, but if you look underneath about half way to the back of the car you will see it sticking out of some of the exhaust work down there.

Then, assuming that you've changed the right O2 sensor, just disconnect your negative terminal and go enjoy a night of beer, and come back, plug it back in and see if the code is gone.

Once you've found it you may need an O2 sensor socket to get it off, if you don't already have one. Autozone lends them out, or you can buy a new one for about $15 from autozone.

 

jumpr, it is not OBD II.

 

[KokomoGST]

If you disconnected the batt for only a minute, that shouldn't be enough. Some computers can hold it's settings for up to 20 minutes (Toyotas usually hold for 20). I have 2 O2 sensors on my 95 car... and it's OBDII. I'm not terribly familar with Nissan Sentras but I do suspect it could also be OBDII depending on the date of manufacture.

It could be that it's NOT your O2 sensor (you replaced the rear one it seems?) but it could very well be a bad catalytic converter. You can try unattaching the rear O2 (let it sit in fresh outside air) after the catalytic converter and run the car for a while... see if that gets rid of the CE light. If it does... prolly bad cat.

 

Originally posted by: Roger
jumpr, it is not OBD II.

Oops, you're right...I didn't realize it was a '95. I think he should still go back to Autozone and reset the code, and if the CEL comes back, he'll know for sure that he replaced the wrong one.

 

[psteng19]

Originally posted by: jumpr

Originally posted by: Roger
jumpr, it is not OBD II.

Oops, you're right...I didn't realize it was a '95. I think he should still go back to Autozone and reset the code, and if the CEL comes back, he'll know for sure that he replaced the wrong one.

I was able to get my '95 Sentra GXE CEL removed with the OBD scan tool.

 

1995 and lower is OBD I, 1996 and up is OBD II.
They used a OBD I scanner on your '95.

 

[DaWhim]

Originally posted by: Kauru
should have stuck with the pimpin', girl-magnet Daewoo

holla!

`K

 

[EXman]

I think the car saw you and said I hate you Chiboy! go post this on the internet