96 Maxima, had cel but it turned off before I could check it. Any way the computer stored it so I can still retrieve it?

Searched maxima cel stored code to no avail, thanks

If the error is intermittent, then the error will clear itself when "X" number of error free drive cycles have been completed. A professional grade scanner may still see a pending code. I have a rear O2 that sets a code about once a month and clears within a week.

That's about the amount of time it turned off in...I also noticed it had a funny o2 sensor reading when I hooked it up for diagnostics a couple months ago so I'm guessing o2. Car has 87,xxx miles and I hear they're due every 100k-ish?

That's what I've read over the years. I've read the rule of thumb is:

OBDI cars (pre-4th gen models) - 60,000 miles

OBDII cars - 100,000 miles.

I've replaced O2 sensors on three 4th gens so far. Usually I buy a 4th gen with 150,000 miles or more that still has the originals. I've noticed an improvement in low end pep and maybe a mile or two MPG improvement after I install new ones.

I've only used NTK (NGK) brand O2 sensors.. Not saying others are bad -- just no experience with anything else.. I think guys find some deals for O2 sensors on eBay. I've bought some there that turned out good..

Here's a PhotoBucket story board (new feature) where I changed O2 sensors on my first 4th gen (95 model).

As you can see I had some rust issues to deal with on that car.



http://s286.photobucket.com/user/Rid..._Sensors/story

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They might be stored under historic codes. I use the torque app that has a option to pull historic codes. I don't know how long a code will sit there before being erased completely.

or maybe ur CEL light bulb went out? does it turn on ignition mode?