Little confused on where this oxygen sensor is located and about how much should it cost? Also is there danger in using the car for a while
way

 

If I recall it is the 02 sensor upstream on the drivers side. Pop the hood on drivers side up by the Coolant resivor look straight down you will see it right there in the exhaust. You will need the right tools made for those to get it out. Some folks remove the resivor for better access but I got mine out with no issue with the tank in place. Follow the wires back from it so you can see where it is connect and to disconnect. You want to be careful with the wires on that connection.
Do not buy this part from JAG. It will be a lot. I recall getting a name brand replacement for about 100 bucks.
You can run on it as it is but you dont want to do it for months, it is confusing the computer and can kill a cat converter.
others will chime in but I am pretty sure I am on target here.

 

Mick, you need to include model and year when asking a question. There is some conflict on what the P1646 meaning depending on year.
Here is a good read and should answer your question.


https://www.jaguarforums.com/forum/x...nfusion-57005/


Wayne

 

Every P1 code is a non-generic code (by law).

You need to look up the code using your make (Jaguar).

Then by car model and year. Yes they do change meanings depending on those! (Only sometimes, but they do.)

Try not to use non-Jaguar web sites / doc for Jaguar codes as they are OFTEN wrong.

All the Jaguar P1646 ones I've met have been the upstream O2 as posted.

With an untrustworthy O2 sensor the PCM has an unenviable problem: what to do about fuel/air mix. It can get "close" but one side of that is lean (risks severe engine damage) and the other rich (burns out the cat). It really wants a working O2.

 

Mike,

As others have already said - Model Year is critical information for this question.

Your forum profile is showing mick99 1999 xk8 convertible and this also shows in our Mod Control Panel as your Signature. No Signature in your post - did you turn off the option to automatically add it to your posts?

Graham

 

Thanks guys. Car is 1999 xk8 convertible

 

Ensure you purchase a O2 with harness already made, some generic ones will have you cut the harness to your desired length they are cheaper but. The circuit and especially top ones are sensitive to capacitive value which can be thrown off by the wrong length or poor connection. Do a search on removal / replacement there are several threads. You'll need a O2 socket to install, when removing I cut the cable and use a proper full socket to break the nut, (the O2 socket may/maynot be strong enough and tends to bend and slip)

 

Good info guys, Thanks

 

Any idea on the size? Is it 14mm, 17mm?