I have a jaguar 2001 vanden plas that ran out of gas i put a gallon in it and it still will not start what could be wrong

SOURCE: 2001 jaguar vanden plas transmission problems

the P0730 code is incorrect gear ratio, suspects are the wrong type of tires on the car or check to see if the transmission has enough oil.

The P0715 codes means Input Turbine Speed Sensor Circuit Malfunction. this basically means that the pump is getting weak and causing the torque converter to slip

SOURCE: 1988 Jaguar Vanden replace headlight

What you need to do is remove the 2 screws on the top bezel from inside the engine bay, then underneath the outer corner of the plastic headlamp surround there is a philips screw, (put your head under neath car near from wheel) loosen the screw, do not remove it, now the headlamp plastic bezel/surround will come free enough so you can get a philips screwdriver in through the middle of the headlamp surround, there is a chrome retaining ring holding the headlamp in place, loosen the 3 philips screws (do not remove) The retaining ring will rotate and you can slide the ring out from the outer edge of the headlamp surround. The headlamp will then come out throught the middle of the surround, disconnect the 3 pin multiplug and reverse process for install.

SOURCE: 2001 XJ8 Vanden Plas engine light

I've had the same problem on my 2001. It turned out to be the battery. Apparently the voltage had dropped to the point that the computer began to malfunction. I'd first go to a battery shop and have it checked under load before looking for other solutions.

SOURCE: Need a wiring Diagram for 1998 Jaguar XJ8 Vanden

See here.

SOURCE: How do i disable valet mode om a 98 jaguar vanden

Try inserting the key into the drivers door lock and try centrally locking and unlocking all the doors a few times. If this does not reset the valet function try using the key in the drivers door lock and pressing the fob at the same time as locking and unlocking the doors. Even with valet mode engaged you should be able to access the trunk by physically inserting the key into the trunk lock.

Testimonial: "it was really helpful and the trunk yea i was able to open with the key but it still doesn't remove the valet all is doing is not keep sunroof open "