Hi all  my x/type had been running ok but yesterday on came a fault flashing heater plug and message gearbox fault, switched off and on but still there drove home in limp mode about 30mph with no acceleration at all the car had felt strange a couple of times changing down on overrun seemed a bit lumpy but I thought I was imagining it however after arriving home switching car off and going back to it 15 minutes later started up no faults appeared and car went perfectly like a rocket gave it a good thrash in manual mode, my local repairer put on the diagnostic and fault logged was g/box fault and knock sensor fault, cleared them both and all seems well has anyone had a similar problem please ??? if knock sensor needs replacing is it expensive and whereabouts is it located.

Many thanks Les.  (2008 2.2Diesel SE/DPF 6speed auto)

I’m no expert but I had a similar experience with gearbox fault amber warning, came on 3 or 4 times over a few months. Happened always when accelerating hard so Thought it was probably the turbo, but when I next had an oil change and service it’s never reoccurred - 18 months later no issues of any kind. I’ve kept a close eye on others having similar issues on this site and it seems these gearbox faults do flag up and then go away again - you wouldn’t be the first for sure. Hopefully it won’t recur. Good luck. I’m also on 2.2d auto. 

Thanks Nathan yes it seems any type of fault on Jags says gearbox fault and proves to be something else and as I have read on here loads of intermittent faults come and go so I will have to see how it goes after already having spent over £2k on repairs since I bought it last October it does not need a service as yet and oil/filter changed about 1000 miles ago anyway thanks again mate.