Can drive my 1997 jagaur xk8 in the S button on center console to use J-Gate with no engine fault coming up not matter how long i drive it. When i hit the button to the left for cruise control and drive it for 5 minutes engine fault light comes on, the car still drives perfect with it on, the light on console you press next to the S so you can use Cruise control goes off as well, codes read P1111 and P1634 car doesnt ever drive different still drives great and has tremendous power im at a loss, turn ignition off and wait 1 minute restart car no engine fault light and cruise control comes back on and everything else is just fine,drive in J-gate no further problems until trying to use cruise control then get engine fault codes back.