Only one I've ever driven was a Citroen C4 Picasso - manual release was a mechanism under the footwell, with a special gizmo in the toolkit you inserted and wound in a certain direction. fjord C4 Picasso Road Tests and User reports Members Maintenance tips Citroen C4 Picasso and Grand C4 Picasso (B78) Road Tests and Model Reports C4 Picasso (B78) General Questions C4 Picasso and Grand C4 Picasso (B78) Problems and Issues C4 Picasso and Grand C4 Picasso (B78) Ice and Satnav questions DS4 and DS4 Crossback 2015. I've got a C4 Picasso 1.6 HDi BMP 2008. Every time I power it up it displays "PARKING BRAKE FAULTY" and after a while "ESP / ASR FAULTY". Still everything works except for the automatic parking brake application and the service light is illuminated. The only fault code that the ESP has is "ESP8.1 No communications with the engine management ECU Back in March I purchased a Citroen C4 Picasso, 57 plate, with an onboard computer system. About a week after buying it, upon setting off at lights, the car stalled and I got a "Handbrake faulty" message, so I turned over and started up again and off it went.  Since then, it would very much be hit and miss as to when it wanted to pop up Hi Mike, I have a 07 Citroen C4 Picasso Auto that has suddenly come up with "Handbrake Failure" followed by "ESP/ASR system faulty" message on dashboard. Since this message, the handbrake does not engage or disengage automatically - it has to be done manually after switch-off and before start. Joined: Jan 22 2007. Location: Hoylake. Citroën will determine the price of the parts, but hourly rate for expertise and overheads will be local. The key may be £65, but the time the blade's been cut, the circuitry's been coded to your car and VAT added, it'll be over £100. The wifes '07 C4 Picasso had a fault where upon pressing the brake pedal the handbrake faulty warning would display along with ESP and ABS faults and lights. I unfortunately forgot to turn the ignition off after releasing the handbrake. I have plugged it onto a diagnostic machine and have come up with the following codes: C156C (92) Electric parking brake (FSE) actuator sensors. C1561 (00) Electric parking brake (FSE) right hand actuator. XaxRv.