Hey all my wonderful jaguar is killing me once again.

Started off as throttle body sensor failed would be just cruising down the freeway and boom straight to idle. Had throttle body rebuilt by asi. Now this has been since Thursday and it now goes in to failsafe but the kicker is no codes my reader picks up. Is it possible it's a tranny issue?? Thanks in advance

 

Also the only code shown is p1000 which I believe it means it hasn't made it through it's checks..

 

Low battery?