Hi guys, got an l320 2011 3.0d, and it did this a while back then stopped, basically it is randomly lossing power, revs drop and then all of a sudden it comes back, cant pinpoint any specific point, its just random, ive read on forums about brake light switches which is confusing lol and inkectors or gearbox but want to see if anyone has come across this before?

Hi
Please...try a "good" read fault code session
Why good ?
Because there're some ECU tuning mods that hidden ligth mil warning on selected fault codes
Some despicable people not only hidden signal but bypasses all related recovery actions , like restricted performance or something else
So ,apparently, you don't have warning or signal and you have a perfect vehicle
But you've only a perfect dashborad

JLR SDD always record all fault codes

Regards

Alex