Emissions and OBD2 port?

GARRY GRAVES

MEMBER
2016 NISSAN TITAN
5.0L
V8
TURBO
2WD
AUTOMATIC
86,000 MILES

I have the Titan XD with the 5.0 Cummins engine. I can’t figure out which fuse feeds the OBD2 port. I found this out by have a DEF warning light come on saying x amount of mile until 5mph (or limp mode activation). Any info on where to start would be great. Also, any info on possible emission recalls on the truck?

Thursday, July 31st, 2025 AT 1:04 PM

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
54,144 POSTS

Sorry, we only handle one issue per thread, please start a new question for the recall information. On this thread will fix the ODB2 port. Please watch this video and check out the fuse's locations (2) in the images below.

https://www.youtube.com/watch?v=6Tlg3JmgNSQ

Fuse # 29 and #6 in the fuse panel on the right side of the dash, this guide can help:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check out the images (below). Please let us know what happens.

Image (Click to make bigger)

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Thursday, July 31st, 2025 AT 1:17 PM

GARRY GRAVES

MEMBER
3 POSTS

Those were correct. I apologize for the double questions. I’m new to this site. I also realized that there was an aftermarket GPS tracker installed inline with the OBD2 port. I’ve owned the truck for just a few months and glad I saw it now. Thanks again for the help and I hope you have a Blessed evening!

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Thursday, July 31st, 2025 AT 5:03 PM

KEN L