Today I took the Jag out to a meeting, parked for an hour, and when I started it up, I got a yellow light and this message. It seemed like the trans was stuck in a low gear. pulled over and shut it down. restarted a few mins. later and problem went away. I also had a dead battery a few days ago, but jumped it with my battery pack and put the charger on it for 5-6 hours. car started up right away. the battery was purchased in 11/2016. Anybody have any advice?

 

The battery is probably not fully charged, and may have been damaged by being discharged. Stop by a parts store and have it load tested. Also ask them to read stored codes and report the codes here, not their interpretation.

 

Fair chance it's bogus caused by a battery that needs replacing.

 

As above, Battery is the first place to start. My 98 XK8 did that, then didn't pull it again for months. After a while it started doing it more and more frequently. (Battery was replaced at the first error.. It tested good, but I discovered it was the wrong battery, replaced by previous owner and markedly smaller than the spec) Eventually after checking (repeatedly) all of the shifter micro switches, I wound up needing to adjust the shifter cable. It was about 3/4 inch or 2MM out of adjustment. I haven't had the code since. *knock on wood Mine was pulling P0706.