Testing the 02 sensor

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11-26-2003, 08:08 AM

chris92

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Testing the 02 sensor

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.

11-26-2003, 08:33 AM

internetautomar

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

11-26-2003, 10:27 AM

eric93SE

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I concur!

REPLACE IT

11-26-2003, 10:33 AM

chris92

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Quote:

Originally Posted by eric93SE

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.

11-26-2003, 10:34 AM

internetautomar

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60k miles not KM

11-26-2003, 11:08 AM

eric93SE

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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).

11-26-2003, 11:20 AM

Jeff92se

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

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

11-26-2003, 11:30 AM

Nismo87SE

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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

11-28-2003, 10:23 PM

rrrfoma

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O2 sensor tool

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!

11-29-2003, 03:57 PM

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internetautomar

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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.

11-29-2003, 04:16 PM

#11

rrrfoma

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Quote:

Originally Posted by internetautomar

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