Three Amigos orange ?

Hi all been doing loads underneath my Disco 2. . ie all bushes, new air springs, drop links, new rear shocks, new ride height sensors, watts linkage and outer bushes. The problem is now get intermitant lights come on dash T/C, HILL DESCENT, and ABS all in orange probs a sensor but which one any ideas please

The only way to successfully diagnose the "3 Amigos" is to read the codes with a compatible code reader; Hawkeye, Nanocom, Lynx.

I ve done the shuttle valve fix to no luck need to get a computer now

Ok thanks for that, so i cant afford a fault reader and wouldn't know what to do with one, is there any chance someone living in or around Croydon or surrounding area has one and could have a look for me, big ask i know.