repairman

For the past three and half years I have been attempting to source the reason for my C4 FWD and Brake warning lights be continually displayed whilst driving. My file is an inch thick.
Then a new post suggesting to overfill the brake master cylinder.
My brake master cylinder fluid was 2 MM under the max level so I overfilled it slightly.
Guess what, no more warning lights.

FormulaRX

Wow good to know! People have said the C4 awd system is very complicated and sensitive. Guess this proves it