2001 Pathfinder engine codes

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LMH1974
Posts: 1
Joined: Thu Mar 02, 2017 1:39 pm
Car: 2001 Pathfinder

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Have a 2001 pathfinder that is throwing codes 0301, 0138, 0139 and 0158

Any help on the severity or cost to fix would be greatly appreciated.


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centralcoaster33
Posts: 2634
Joined: Tue Apr 05, 2005 10:41 am
Car: 1997 Nissan 240SX #5
Location: Central Coast, CA

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Hello and welcome to NICO Club! We have available the FSM for your car (I don't know if you have 2001 or 2001.5):
http://www.nicoclub.com/archives/nissan ... nuals.html

The EC chapter will have a break down of codes and how to deal with each one.
P0138 = Heated O2 sensor 2 (furthest from engine)
P0139 = Heated O2 sensor 2 (furthest from engine)
P0158 = Heated O2 sensor 2 (furthest from engine)
P0301 = Cylinder Misfire (1st cylinder I think)

So, at least replace your secondary oxygen sensor to start. It might be a good time to replace your spark plugs while you're at it. Drive a while and see if codes clear. I don't recommend clearing them on your own. Let the car computer clear them.

Please let us know how it goes!


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