How do you pop the hood on a 2003 Land Rover

Here's a link to your P1592 CODE AND REASON'S. 2003 Land Rover Discovery Codes Computer Problem 2003 Land Rover

Do you already have access to your blower motor? If so you should find the resistor on the motor housing where the blower output is located. It will have wiring plugged into it. When you remove it it should look like a heatsink.

my 2003 Land Rover did that while moving and I found out that it was a loose mud flap. If it does it while it is stopped it may the lifters in the engine.

More details can find in the Discovery-Series-II-2003-Driving-Operating (page 28).

Hope helps (rated this). Good luck.

call the person dealer and ask them him her for the code

Please check the a/c compressor clutch; it may be not working. FYI the compressor does not run all the time. It is the clutch that will cycle on and off to maintain a/c circuit pressure. To check, put the a/c on high and watch the compressor under the hood to see if it cycles.

remove assembly and clear restritions in ports

try rangerovers.net. they have a tone of info on land rovers

Cig fuse is F10 (15amp fuse) and the fuse box is located behind the driver's side cubby box.
Passenger Compartment Fuse Box - behind the driver side cubby box
Panel & Relays

It is usually listed in the top section of repair invoices from a dealership.
If you still cannot get the code. there are many sites on the internet that can
supply the code for a fee.