dover52

I’m a newbie. I have an ’01 Xterra. Last year at 30k my check engine soon light came on. I took it to the zone and all 4 codes were for O2 sensors (0135,141,155,161,) O2 Sensor Heater Circuit Malfunction. Now all 4 sensors can’t have the same problem like this at 30K can they? Anyway, last year I didn’t need an I/M test. This year when I took it to get smogged the tech said it’s an auto fail. A racket to force us to spend money at the dealer. Money that I don’t have right now. Now on the 2000 Xterra you could manually clear the codes on the ECU. The repair manual I have even shows you how. With ’01 and newer it says you can’t. last night at another forum a participant said you could still do manual reset on the ECU.

Now my question. First, is it indeed possible to manually reset the codes on the “01? Secondly, where is the ECU/PCM modual In the ’01? The repair manual I picked up makes no mention of where its located. It’s almost like this is top secret stuff.
Help!!!!!!!!

lewisnc100

At least with the Pathfinders, there was a diagnostic mode selector screw on the PCM that you could use to clear the codes, went away in the 2001 model year. Might be the same with the Xterra. You could also unhook the battery for a while to clear the codes. But if you are trying to clear the codes to pass smog testing that won't work, you'll clear the codes but the OBDII system will show that your monitors haven't run so it will be an automatic fail again.

There was a TSB for multiple oxygen sensor failures on the Pathfinders, maybe it applies to the Xterra. It called for a new ground setup. Might check around for that info as well.

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1997 Pathfinder XE
Air Lift Air Bags, Warn Hubs

twoshady

Any advice for an air bag warning light on an '02 X-terra? I would much rather do a quick reset myself than take it to the dealership and be charged something outrageous.