jaguar s type 2006 3.0 v6  can not read trouble codes not supported  here is one more tech support

 Well I take that back it does read it,  car battery under 11 volts  computer was freaking out under voltage as they normally do.

  yes buddy your right about that  the funny thing with this car  I was able to read data  thats why it never dawn on me to check voltage  I realize it was low when I tried to start the car   it cranked slow i said wait a minute  put a charger on it  and sure enough i was able to read code  by them i had already reported the problem too fast on the trigger  well one less thing to worry about.