ECU update question

any aftermarket ECU, which Maxima.org is usually talking about, will void your warranty.

There may be a TSB, technical service bulletin in which the ECU was replaced for some reason. Check with Nissan for that.

CD

Thanks CD - I was referring to upgraded software for the Nissan OEM ECU...I have read that some have had their ECU's flashed with "the upgraded software" at the dealer.

Or I could just be really confused... ;^)

Naxray - you are not going crazy....

There is an ECU update (infact there maybe several) available for some

5th Gens. I was just discussing this recently with NissTech, you might be able to find our discussion if you search the groups.

The gist of it was that the update most likely relaxes the criteria that are used to set the CEL based on out-of-spec readings from O2 sensors (for example). If its a TSB, it's not a warranty covered item, but you can call your local dealer and ask if your vechile is included in the TSB (or dig out the TSB and check yourself).

Cheers, Nirav

96 Max GLE, 122k

Note: I know there was a ECU update early on in the 5th Gen's cycle for a fuel-cut related issues that affected 5-spds. This is seperate from the update you are interested in.

There is a TSB, but it only applies to California emissions vehicles (check the decal under the hood of your car), your MIL("service engine soon")light is on, and your ECU is reporting the 3-way catalyst error (P0420). If that's the case, you can get it covered under the 8/80 warranty -- if you argue enough. But if the light isn't on or your car isn't Cali emissions spec, you're out of luck.

This answer is the correct one.

Nissan has numerous ECM software updates for a number of vehicles, but just because there is new software does not mean you need it. The ECM software is designed to address a specific problem .

The main thing to remember Nexray is this ... If it ain't broke, don't fix it.

Thanks to all for the info!