I suspect my 02 sensor is giving me problems ( see http://forums.maxima.org/showthread.php?t=262533).
Does anyone know how to test the 02 sensor on a '92 VG motor? I did the self-diagnostic check, and no codes were shown, but I'd like to check the 02 output voltage while I drive and I was wondering which wires to test, my manual is little help.
Thanks.

 

If it's got over 60k on it change it! period

 

I concur!

REPLACE IT

 

Replace at 50,000 kms (35,000 miles)?
I guess I thought I'd get more out of it than that.

 

60k miles not KM

 

Well it can go bad that soon. It has a lot to do with how well your engine is running. If its producing a lot of carbon, then the sensor will foul up quickly. So you can consider doing a full tune up (cap/rotor/plugs/wires). It could also be caused by a leaking fuel injector, causing a cylinder to run rich and then unburned hydrocarbons will be in the exhaust stream (then plugging the 02 sensor).

 

Read this and keep this link for reference every day of your natural life

http://www.cybrrpartspro.com/Chilton...61CH04_15.html

 

To check the o2 sensor put the ecu in diagnostic mode I and start the engine. I believe the CEL will blink each time the o2 sensor goes from rich to lean, if it doesn't toggle then its bad.

EDIT: Tree'd by Jeff

 

I'm a bit confused ... - just received a bosch O2 sensor in the mail and to my big surprise 7/8" O2 sensor tool is too big. If fact bosch one is 17mm ...
The question is ... which socket do I need to unscrew a factory one?
Is it 7/8"? ... or 17mm? It would nice to know ahead - before I get under the car

Thanks!

 

The nissan o2 is smaller than standard o2s by a considerable margin. so I'd suggest either modifying a deep socket with a slot up the side.
or just use a wrench that fits on the new one.

 

I decided to settle with a 17mm crow's foot wrench