Hi I have a Range Rover sport 2.7 on a 55 plate it will not select any gear at All will not drive the code are any advice would be great thanks P0850 P0730 P0746 P0735 P0731 P0729

SOURCE: range rover have no heat or ac

First thing I would do is check your fuses. If all of your fuses are intact, I would make the assumption that it must be the control assembly itself (your actual dash control unit) since to my knowledge it is the only point where the two exclusive systems (heating and AC) are integrated with each other, aside from sharing the duct and to some extent, the electrical system. Being that neither the heating NOR cooling system will work, it seems the only common denominator.

If you have blown fuse(s), remember that fuses almost never blow for no reason (wierd things DO happen on occasion!), and this is usually just a symptom of a deeper issue, such as a short or fault in your electrical system such as your fans, or other components, drawing too much current. Locked fan rotors will blow fuses, for example. Having to replace the fuse again in short order would indeed indicate the need to troubleshoot further.

Good luck!

SOURCE: I have the same problem code P0731 is the only code

P0731 code in my book states
Gear 1 incorrect ratio

SOURCE: Range Rover Sport Supercharged radio frequency problem

you need 2 remove your radio and open you shloud change the ic for frequency to work it is very easy to change it if youneed ana help contact me

SOURCE: 1998 Chrysler Intrepid ES 3.2 Code P0731.

Check the connection to the vehicle speed sensor. You can check the vehicle speed sensor by using a voltmeter set at millivolt. Then pass a metallic object close to it. The sensor should induce voltage as you pass the metallic object close to it. If not replace the vehicle speed sensor.

SOURCE: how do i change drive belt on p38 range rover

My sincere apologies for the delayed response.
I am personally going back to answer your unanswered questions.
I have only been a free contributor to this site for the past 4-months.
Not sure if this what you need for the "P38" but it is for the 1996 Range Rover.

I do not know if you still need this information, but I am going ahead and answering it anyway.

Click on the following Link. It has the several Serpentine Belt Diagrams, one of which matches your specific vehicle with your particular options (AC, Power Steering etc..).

Regarding HOW:
Standard Rule to Removal the Serpentine Belt:
1. Find the Tensioner(s). (See Diagrams on Link)
2. Rotate/Move the Tensioner away from contact with the belt and towards the area where the belt is not in contact with the Tensioner Pulley. The Tensioner is spring loaded, and is hard to rotate/move.
3. Remove the loosened belt off one of the other more easily accessed Pulleys.
Standard Rules for Installing the Serpentine Belt:
a. Pick a Pulley that is most easily accessed. This will usually be on top. This will be the last Pulley that the belt will go on.
b. Using the Diagram: Install the new Serpentine Belt on the remainder of the Pulleys....over, under, left right.
c. Using a Serpentine Belt Tensioner Tool or Wrench or Ratchet Tool: Rotate/Move the Tensioner Pulley/Arm "away" from Belt contact area on the Tensioner. This spring is pretty hard and with a new belt, it will be even harder to install. Rotate/Move this to as-close to the maximum allowed inorder to have enough slack in the belt to get it up and over the last pulley.
d. Using your other hand - Pull the Belt up and over the Last remaining Pulley.
e. Before releasing the pressure on the Tensioner, visually inspect the remainder Pulleys and the Belts' Positioning on them.
Let me know if this helped...

http://www.2carpros.com/car_repair_information/year/1996/make/land_rover/model/range_rover/1996_land_rover_range_rover_drive_belt_routing_diagram.htm