Hi, can anyone help, i have just had my rear brake pads and discs renewed and now all of a sudden i am getting these messages come up. Is it dangerous to drive, i have booked it in but Citroen wnat £100 just to put it on the diagnostic machine. Reply. 0. check contact on buld holder for corrosion or dirty contact. use a multi metter or test lamp and place it onto the connection inside the bulb holder to check if you have power going to it when brake pedal is pressed. Answered Sep 14, 2011 (12 years ago) delboy_11. 61 points. Reply. 0. If the handbrake warning light on your Citroen Grand C4 Picasso comes on and starts flash, then there is a good chance that ABS sensors of your wheels have a problem. As a reminder, the role of the system is to regulate the brake pressure when you press the brake pedal, to prevent the wheels of your Citroen Grand C4 Picasso are locking, causing Really need some help have a C4GPE 2008 and it has the hand brake fault i have two codes U1219 Permanent Fault Automatic Release of the electric parking brake data invalid. C1555 Electric Parking Brake Activation/Deactivation control short circuit to earth or to positive. I have just tried a new hand brake switch but with no luck. Still has Ignition on: The electrically controlled parking brake releases if the button is not held. Ignition off: The electrically controlled parking brake releases if you hold the button for less than 3 seconds. The specific warning lamps shown in the diagram above are lit like this when this fault is active: "a": lit. Ive tried that - when I say the fault isn't there - what I mean is the auto brake works - i.e disengages the car - however as soon as soon as the fault shows the auto handbrake feature stops working. Its like the car is on catch up with the fault. I have a cup of tea in hand which is always a good thing ..I will try your suggestion again though. 8. Citroen C4 Grand Picasso: Brake Lights, ABS, and ESP Warning Lights. Owners of the Citroen C4 Grand Picasso have reported issues with the brake lights, ABS, and ESP warning lights coming on intermittently after driving approximately 15 miles. This issue also leads to gear selection problems. 8.1 Diagnostic Testing and Remediation The handbrake makes the usual noise when the lever is manually pulled, but more quietly and for a longer period of time than it normally would if working properly. However the "handbrake on" or "handbrake off" message does not appear at the end, and the handbrake does not hold the car after the switch is pulled. Electronic handbrake fault By Taylor, July 2, 2023. 2 replies; 332 views; paul.h; July 19, 2023 Citroen grand c4 picasso 64 plate warning lights By Emlou85, JHerU.