DS5 auto handbrake problem

[Mares]

Hi, I have error codes P0562, C1555 and U1219 related to auto handbrake release on my DS5 2011., 2.0HDI 160hp 6-speed automatic. Auto handbrake switch is not operating but brake is operating itself (when turning car on/off it activates/deactivates automatically).

Should I suspect on handbrake switch or there might be some other things to check (like fuses?)?

I have diagbox diagnostic and when try to delete errors, they are triggered again immediately.

I tried to disassemble handbrake switch, removed central console and managed to take out the lever-button but it seems connection where cable goes is separate part and have to be disassembled separately, it was quite touchy job so I did not want to break plastic (as I am not 100% sure if the switch is failed or not).

[GiveMeABreak]

Your vehicle's main battery is most likely the problem, P0562 in an undervoltage problem with the ECU If your battery is older than 5 years old - time for a change, otherwise charge the battery for 24 hours at least.

This is the season where more demand is made on the battery and if already weak, expect the start of electrical problems.

[Mares]

Battery was replaced 1 year ago so it should not be a problem. Also diagbox shows regular voltage (about 12.2V engine off and 14.4V when engine is running).

Problem started to appear about 2 months ago (no free time to solve it), usually during longer drives (eg. on a highways) error appears quite often during driving, for urban drives (4-5kms) error message appears when ignition is on.

[PaulC5]

12.2 volts is a flat battery, should be about 12.7 volts if fully charged before the engine is started first thing in the day.

[Mares]

I will double check it but I doubt it is battery as it is only 1 year old and also error codes are triggered even when trying to delete codes while engine is running (when voltage is higher - normal).

[RichardW]

Usually you can't delete the codes when the engine is running. Where are these faults present? What's in the ABS or handbrake ECU? What does the live data say?

[Mares]

Voltage is 12.10V when car is off (overnight, prior first start) so battery is good as predicted. Not sure where to start tracking the problem, either from handbrake switch (which is a bit awkward to reach and disassemble. I think I read somewehere for x7 there is also some cable/switch on a brake pedal that could cause similar issue?

Is there any fuse related to handbrake I should inspect prior going deeper into solving problem?

[GiveMeABreak]

Apart from the P0562 fault (EPB ECU supply is undervoltage lower than 7.6V);

C1555 means activation/deactivation control fault of the electrically-controlled parking brake: Short circuit to positive or short circuit to earth (look to a faulty EPB switch button or the EPB.

U1219 means there's a fault with the automatic application of the EPB - the data is invalid. Suspect Connectors, CAN Network or ESP ECU.

[PaulC5]

'Voltage is 12.10V when car is off (overnight, prior first start) so battery is good as predicted.'

This is showing the opposite, should be about 12.7 volts. I am surprised the car will turn over on the starter, have you checked if your volt meter is correct ? I would charge the battery up, it might be you are just doing short trips so the battery is not being charged up enough by the car to replace what is used up when starting it.

[Aantolkovic]

I have a DS 2017 Hybrid... I left the car on a hill this weekend to put chains on and handbrake was up.. The car release handbrake and started go backward, I was able to jump in and turn the wheel so it didn't hit another car and I hit a tre?e and stop.. Hill was arround 10%.. In the car my wife and child were in the car seat.. It's not the first time this has happened to me. This was fatal.. I love the DS, but its very bad car, bad electricity.. so I will never even buy the planned DS7.. Be careful with them and get life insurance!