Hello All, I got the P0031 : heater circuit low input bank 1 sensor 1. This the driver side upstream sensor. After some research, I tried replacing the sensor myself. Long story short, I broke black wire in the harness that the O2 sensor plugs into.

I can’t see where the other end of that harness is. Looking at some pictures online, it doesn’t appear to be that long so I’m sure the other end isn’t that far away.

has any replace that harness and can provide some tips? What components to remove to get to the other end of the harness?

Was also thinking about splicing that one broken wire to its mating counterpart on the O2 sensor as an alternative.

TIA

 

The O2 sensor comes through the floor and behind the center console. It is not easy access.

I would consider the splicing option

 

Splicing it is…all is good now. Thank you.

i spliced the black wire of the car harness to the blue wire of the O2 sensor. Will add sealant to keep water out of the splices.







here are some pics.

 

Since we are from the same state, I'm going to suggest you go to a different style connector that can be heat sealed and then heat shrink tubing over top of that connector. Since our state is so wet.

 

Agreed. those scotch lock connectors are garbage- they cut into the the wire, and let in water. Heat shrink butt connectors have been my go to for years.

 

Yes a proper heat shrink splice would be my go to choice as i’ve use only that for proper splice on anything that may be exposed to moisture.

But have any of you tried splicing a wire that is so short and in such a tight spot that you barely get two fingers on it? Not to mention you can only touch it from one side. Now try doing that with a moisture proof splice and getting a crimper up in there crimp the splice.

Would love to see some pictures.

 

I'm not criticizing your repair if it gets the job done and fixed the problem, but I wouldn't consider it permanent. Was just trying to give a little helpful info is all.

And yes, I have done one handed wire repairs while upside down...

 

That makes 2 of us, do you work on Aircraft by chance.

 

Nope. Old cars, bikes, boats...

 

You might want to try one of these

 

I can go home now, my day is complete - I learned something!
Those are cool. thanks

 

I agree, the splice I used may not last long, but it was the only type I could get the broken black wire in and press that metal piece down to make contact with the conductor using a long needle nose plier. I will add some sealant to help protect/insulate it. When it decides to fail, I will try a different type of splice then.