Ac repair 2000 land rover discovery

Question edited for clarity.

My late mother worked at the Land Rover plant in Solihull and put careful miles on a Disco when it was known as the 'J Car'. Also the first Vogue with a turbo. Long time ago!

Information and videos on both codes.

https://www.google.com/search?q=2000+Land+Rover+Discovery+2+P1481


https://www.google.com/search?q=2000+Land+Rover+Discovery+2+P1451

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Hi welcome main problems are the abs valves causing the 3 dash lights (search 3 amigos online) a really badly sited compressor can cause air suspension models to fail giving the bags a slow leak the V8 is a solid engine but can have radiator expansion tank and cap failures
the other issue is electrics windows and door looms are problematic

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

dealer

That is a AC compressor problem.
It may be no compressor oil in that compressor

dealer only

Check fuses.

THERE SHOULD BE A RADIO CODE CARD WITH THE VEHICLES PAPER WORK.IF NOT U HAVE TO CALL THE DEALER FOR THE CODE.

http://carservicemanuals.blogspot.com/2008/06/range-rover-discovery-ii-defender.html

GL

LAND ROVER DISCOVERY II DONT HAVE FUEL FILTER, ONLY HAVE PRE FILTER IN THE FUEL PUMP