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P0138, P0139 & P0140 help.

NAVY

By NAVY,
in 96-2004 R50 Pathfinders

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NAVY NPORA Newbie

NAVY

Posted
Posted (edited)

Hey,

I have having those codes for 3500km will driving from Montreal to Edmonton. I have bought a 2001 Pathfinder LE 101,000km (3.5 VQ35DE). The SES went on, sow i purchased an OBD2, P0138 P0139 and P0140 showed up. From what i understand it is the rear right O2 sensor. Can you people help me locating the correct O2S, buying a new correct one and other stuff i should know.

thanks

1115001605.jpg

Edited by NAVY
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Simon NPORA Old-Timer

Simon

Posted
Posted

NTK Part # 24574

 

It should be after the first cat on the passenger side. Square-ish 4 prong connector on that one in the engine bay.

 

RockAuto sells them for $67.99USD

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Howie NPORA Fulltime Resident

Howie

Posted
Posted

I got the one from RockAuto, and it's been working great. No more trouble codes. Did anyone else who replaced a rear O2 sensor have trouble getting to all the wiring harnesses? There were 2 of them I think up near the engine that I couldn't reach from above or below. So I ended up just cutting the wire and pulling the old one out. However, those harnesses are still there, and I couldn't get the new one attached to them.

 

--Howie

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