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Puppetmaster

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  • Your Pathfinder Info
    Don't have one yet
  • Mechanical Skill Level
    Standalone Tool Chest Mechanic
  • Your Age
    30-35
  • What do you consider yourself?
    Rarely Go Off-Road
  • Year
    1987

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  1. I'm working on a 2001 Pathfinder with a P0420 and P0160. The P0160 is simple enough, but the P0420 could be a little more involved. I'm 99% sure the precat on that bank is rattling, which to me would imply some or all of the honeycomb has fallen apart. It isn't a heatshield either, because I checked those. Does anyone have a good source for OEM replacement precats or even the entire exhaust manifold for Bank 1? I think the cheapest I found was around $200 shipped just for the precat from www.autopartswarehouse.com and Rock Auto. I'm almost sure a Nissan dealership would ask for about $800 for the precat. I guess a cheap way out would be to gut the precat, throw on an O2 simulator, and call it a day, but if I'm already in there, I'd rather just replace the precat. Any thoughts? Thanks.
  2. I'm glad to hear that this fix is working out well for other people. I'll remember to post info here too if there are any other Pathfinder issues I run into that haven't already been discussed. I'm also going to have Dave Burnette see if he can help this forum out with OEM parts in general. It can't hurt having an OEM parts guy around.
  3. As mentioned above, I think you should at least reset the ECU with the new MAF. Reprogramming would require a Consult II at the dealership and is a software update, and that couldn't hurt if you can get it done cheaply or under the federal emissions warranty (which is up to 80k miles, IIRC). From what I've seen, it isn't necessary for the car to run right, but there could be more subtle issues that I'm missing.
  4. Glad to know that the fix worked for you. I was actually the original poster of that info over at nissanforums.com and wanted to say that the 01 Pathfinder that I fixed is running perfectly after almost 2 weeks of driving, including both city driving and a trip from Arlington VA to Charlotte NC. I did not reset his ECU, but I will at some point because I want to reset his fuel trims. I will also have to do more reading on the 01 ECUs and how they deal with the diagnostics and feedback, although I'm sure they are very similar to 00-03 Maximas, which I am somewhat familiar with.
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