I just purchased an 03 jag x type it has a gearbox fault and cruise control not available checked with obd 2 and got error codes p0646 p1643 and p1000 which the last one i couldn't even find a code for jag just gm and bmw pulled the ecm didn't find any sign of water but cleaned it all out and waterproofed it put it back in and same codes and faults have not tried the tcm yet do you think that it may be in the tcm or am i wasting my time also it is in limp mode any response would be greatly appreciated thank you