My 2000 Max check engine lite came on, and the scan tool says I need to replace the rear O2 sensor. The TSB said something about re-programming the ECU when the O2 is replaced. Can someone shed some light here on why I cannot just put a new Nissan O2 and leave the ECU as is, so I don't have to have deal with the time and hassle of working with the dealer service shop?
This comes up over and over again. Not being a dealer, nor the software guy that wrote the ECU code, my guess is that the ECU re-flash, among other things, most likely just changes the sensitivity of the ECU in detecting and reporting emissions component failures (O2 sensors, for example).
You could just replace the O2 sensor and reset the CEL - and would most probably have no problems.
Given that the emissions warranty is usually 7yrs/80k (or something similar), you may want to call your local dealer and ask nicely if they would be willing to reprogram your ECU for free or a small fee. I'm not sure what the "official" dealer stance is supposed to be on these things.
Cheers, Nirav
go ahead and pay for it and avoid the dealership hassle, Nissan won't mind a bit.
Although depending on your mileage you may get it covered under warranty... but I guess that's too much of a hassle
I have Check Engine Soon light in my dash and the dealer said I need an O2 sensor. But after 2 weeks the light cleared up. Does this means I don't have to worry about it? How could this clear up? Possible loose connections? Or get it replaced anyways or is this something I can do in the garage.
2001 Maxima SE 20th Aniv Ed TIA Joel
... the light cleared up. Does this means I don't have to worry about it? ...How could this clear up? ... Dont worry be happy: read how system works, clic check top lef 'Favorite Links', see link below
Still pimping that tired old web site I see.
That information is all fine and good if that car is of the non OBD2 type Nissan vehicles.
Do you know what OBD2 means Wik... whatever ?
can you explain what a rationality or normality failure of a componet is in relation to the OBD2 diagnosis system, do you know what OBD2 means do you know what constitutes the setting of a code in OBD2 probably not . sounds to me like you are just another shade tree wannbe that thinks he knows just enough about cars to f*ck them up.
PLONK . to the blocked senders list with you matie
If you have a J30 series maxima (89-94) then use this site, anything else you are wasting your time.
Links', see link below
I often wonder how some ppl can write but alas not read - the reason Italian police patrols always in pairs...
I just had the same problem. I brought the car to AutoZone where they connected the scanner for me and found P0135 - O2 sensor.
I couldn't locate one anywhere except at Nissan, and it was$140. They also told me that they needed to download new software for the ECU ($150) and with the installation, I was looking at $500.
Someone told me forget all that, and disconnect the battery for about 30 minutes. I left it for about an hour, and when I put it back together, the light was off, and the only thing I needed to do was reset all 18 radio stations and the clock.
Of course, if the light comes on again, I'll need to replace the sensor I guess, but for now...all is good.
Z
The light WILL come back on again eventually and the only fix is to replace the sensor. Nevermind the fact that you might still be under warranty and Nissan might do the work for you for free...
While the sensor is marginal, the light may stay off, but you'll get poorer performance... As the phrase goes, 'penny-wise, pound foolish'.
Nirav
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