Bought a 2002 4.4 2012 painted white conversion for SWMBO checked everything,rear air shocks replaced I think fronts as well, went up and down far quicker than mine, checked everything except hi/lo range as switch was busted. Drove 160 miles home no problems, next day engine management light comes on reads as implausable signal, guy says does it every now and again as LPG runs richer !!!! Will get that checked. Anyway next day normal air fault comes up, turn car off and went away, slowly got more regular and now constant but steering not too heavy, any clues, doesnt clear with solas and shows no codes, car sits at normal height. One day your life will flash before your eyes......................................make sure yours is worth watching!

Could be corrosion in the ABS unit (lots on here about that).

Or faulty connection of leads onto better Pole leading to interrupted power to CANBUS system.

ABS unit was going to check. i even have a spare repair loom, can you elaborate on 2nd comment, was going to swap battreies with mine as I know low voltage can play havoc. One day your life will flash before your eyes......................................make sure yours is worth watching!

If Pos or Neg Lead not tightened properly onto the 2 poles (nipples! ) then they can move and lose contact which can lead to a complete power loss or interruption which can then set off/interrupt the CANBUS leading to faults showing.

Gotcha will give nipples a firm squeeze  One day your life will flash before your eyes......................................make sure yours is worth watching!

mine did that , it was steering wheel not centred properly, tracking adjustment sorted it

Checked all fuses, cleaned abs connector, ran car with charger connected at 14.2 volts still no joy.

Heres what the guy wrote, Hi sorry to hear that,, my mechanic replaced front drivers air bag, calibrated ride height (didnt think you had to) replaced both rear air bags then calibrated again???? then had no more issues. When having problems originally with suspension all dash lights would come on if I went on a full left lock (thats what it did for us) first time it happened turn off and wheel side to side cleared it. One day your life will flash before your eyes......................................make sure yours is worth watching!

voltage at Bat was only 13.3 but the charger upped it to 14.2 One day your life will flash before your eyes......................................make sure yours is worth watching!