3 amigos plus one!

Live North East Bristol. Have Disco 2 td5 (52). Does anybody have a code scanner local to me? Have 3 Amigos plus one! Ride height light, hill descent, tc and abs! Converted to springs years ago but garage never disconnected compressor. Same garage serviced last year but ignored oil on valve wiring loom. Oil tracked into ECU but great mobile mechanic managed to drain ECU and replace smashed valves for a bit of history on my disco. Been fine since. I have also noticed drain on battery. Battery replaced early this year. Not sure if faulty speed sensor, shuttle valve or ride height sensor will cause warning light to come on. Any help/advice welcomed

Probably be better off putting this in the Disco section mate but make sure you do a search first as it may have already been covered.

Cheers just learning way around