Long-running intermittent throttle pedal problem

[bennyp]

Going back two or three years, my exeo has been throwing up throttle pedal position fault codes, causing ABS/TPMS/coil/engine management lights to come on, and then limp mode. On a couple of occasions the pedal has entirely stopped working for a period. Often stopping and starting again is enough to cure the problem, but sometimes (perhaps mostly in very wet weather?) it persists for hours/days.

We have changed the accelerator pedal (for a used one), and put in a new throttle body, and checked/cleaned connections, but nothing seems to make any difference.

Where next? I don't really want to spend £200 on a new accelerator pedal if that's not the problem.

Thanks!