C5 cruise control

[Forrester123]

Recently bought a '57 C5 hdi estate.
There is a problem with the cruise control. Sometimes it works but mostly have an advisory that the C/C is faulty.
Any ideas of the cause & rectification?

[GiveMeABreak]

Several - but CC is usually deactivated when there is a problem with the engine or the ABS / ESP system. Best to get it read with Lexia and put the fault codes up.

If it is a temporary fault, you'll find the CC will work for a while until the same fault reoccurs, then it will be deactivated again by the Engine ECU.

[citroenguy]

If you don't have any other problems, the brake light switch is a possible candidate.
Had a similar issue on my old mk2 C5

[Forrester123]

Thanks for the info.
Will get a lexia read out on my next service in a couple of months.