P139C 2021 Ford ranger 4x4 Help!!

[Anthonypb]

Hello

I just had my engine light go on and truck is driving totally fine no issues, no hesitation. Nothing. The code it is giving is P139C DTC. It is a 2021 Ford Ranger 4x4 XLT with 63,000 miles. I’ve read all the forums and everyone is saying a different sensor and part number so I am a bit confused what is causing it and what I should be changing to get rid of the code? Should I be changing part # LB5Z-9J433-B? Any help would be great?

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[My12SecRanger]

DTC p0139 is for the upstream 02 sensor issue, I do not show a p0139c code

 

[Anthonypb]

It doesn’t have a 0 in the code P139c is the code

 

[airline tech]

Yes, P139C is the DPFE sensor, Ref, The Buck Surge thread.
and for REF: P0139 is for O2 Sensor

I just posted the correct part numbers for this code: Post #596

Bucking/Surging Epidemic | Page 40 | 2019+ Ford Ranger and Raptor Forum (5th Generation) - Ranger5G.com

 

[Anthonypb]

Thank you, hope this gets rid of my code, do you know if i need to reset anything or is there away to clear the permanent code after I replace it?

 

[airline tech]

It will reset on its own after replacement, after a few drive cycles., or you can clear it with Forscan

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