Citroen C4 Picasso Auto on a 57 plate,
Customer complaing that the EPB wont release automatically as she drives off.
No fault codes in EPB module. But dash board messages saying faults with ABS, Auto gearbox.

Cosa read shows Offside rear Wheel speed sensor fault and unknown fault in gearbox (Delphi & Bosch KTS)

So we started by addressing the ABS fault as she would need to sort that for the MOT anyway.

Once that was sorted and fault code cleared - all other fault cleared, EPB working automatically

Result