Yep, I can tell a noticeable difference after the software update was updated to get rid of the 02 sensor warning on my 2015 FType. I will update this post with the service ticket including the Bulletin number.

It has crackles still, but not much of a throat on acceleration. I seriously hope this can be remedied.

 

search this forum for "O2 sensor." There is another update that needs to be applied to your car to fix this problem.

 

couple of weeks ago I had the same issue on my v8s after the update, dealer finally installed the new update and the problem was gone. Exhaust sounds like it should.

 

https://www.jaguarforums.com/forum/f...3/#post1469523

 

Ok I wonder if I am going crazy, because today, my exhaust sounds like it was before the upgrade what gives? I mean, great, but how's that possible?

 

I have found that after every tune, I have had to wait a day or two for full sound effects to return. For some reason it requires a certain amount of adaptive learning.