Land Rover Repair: lights on dash, dash lights, engine control module

Question
I have a 99 D-2 70k My 3 amigos are on and i get 1590 code. truck is running good, no problem with trans or suspension. But  my  dash lights ( brake,self levelling & off the road) they come on my be every 2k. When i turn the ignition off you won't see them again for some time . Help...thank's

Answer
Code 1590 is a rough road signal, which would cause ABS, TC, and HD to be disabled whilst disabling misfire detection for the engine control module.  It will not bring on the check engine light but information on any faults will be stored in the SLABS unit.