I just purchased a 2001 Pathfinder, 4WD, manual transmission last week. It's great fun to drive and I really like it. I've found lots of great info on this site to help with some of the minor issues I've found with the car. I have no previous service records on this vehicle (just hit 102,000 miles). I'm not that great with car mechanics, but my son is and he will be helping me.
Here's my question. The service engine soon light came on and I went to Autozone and they hooked it up to the OBDII reader and found four codes: P1110, P1135, P0171, and P0174. Car runs fine, no problems with lugging or missing. I will have to get it through WA emissions testing fairly soon. Which of these code issues should I address first? From my internet searches it appears that I should (cheapest to costliest):
- Replace gas cap (although it looks like this has just been done - with an aftermarket one)
- Change air filter with one I get from the Nissan dealer (looks like someone recently replaced this also, likely aftermarket one)
- Get an oil/filter change using 10W40
- Use higher octane gas (I didn't know so I just put in the regular octane I've always used in all my other cars, only one tank so far)
- See if codes go off/reset codes to see if they come on again (just purchased my own sensor to hook up to my Android phone so I can do this). But this may mean I have to wait a while to get emission tested or OBDII will give "Not Ready" signal and I'll fail emissions even if the SES light is off
- Replace MAF sensor with Nissan Maxima MAF part 22680-2Y001 (get from dealer) to address P0171 and P0174 codes
- Maybe replace fuel filter?
- Deal with P1110 and P1135 (still researching this one - kind of confused from what I've read)
Do these steps seem reasonable? Am I missing something? Has anyone ever had all of these codes at once or am I just lucky? Thanks for any advice!
Last edited by 91Pathfinder97
on Sat Jul 21, 2012 10:19 am, edited 1 time in total.