I get a Check Eng Light that comes and goes on my 2007 XKR. The code from this is P0171 system too lean bank1. Anyone have some input on this? Thanks.

 

This thread may help,
https://www.jaguarforums.com/forum/x...61/#post688946

 

If I assume correctly, that thread will probably say "Vacuum Leak on Bank 1 Vacuum System".
Quick and easy way to find a vacuum leak is a cheap, easy and fast Smoke Generator. Most auto shops have them.
Course again, I didn't reread the above link, just assume.

 

There are no "extended codes" for P0171 on the 2007 X150. The full list of possible causes is:





Graham

 

Are the possible causes and actions the same for the 2009 XK? I just determined that mine threw the same code (P0171) today. Bringing it in to my indy tomorrow to check out but I'd like to get a better sense of what the problem really is. Thanks.

Update: My '09 XK has 43K miles with a pretty solid repair history. I purchased it in November 2020 and have only put about 700 miles on it since. It's been on a tender in my garage for the past 5 weeks since I had shoulder surgery and couldn't drive. My wife drove it a couple of times, maybe 15 miles or so, and it was fine.
Yesterday, I started it, idled for 10 minutes and drove around the block before parking it in the garage again. No problems. Today, I started it and thats when the CEL came on. It idles and runs fine. Visual inspection of hoses, etc looks good. Fuel filler cap is tight.
I spoke with my mechanic and he said to clear the code and drive the car. If the CEL comes on again I'll bring it to him for a smoke test. He thinks its just from sitting these past few weeks and the short drive around the block yesterday didn't help.

Thoughts?