Electrical faults and navigation problems in a Citroën C8 Diesel 2013

Hi, I had a similar problem with my Citroën C5 Diesel from 2010. The car showed similar symptoms, including electrical faults and navigation not working. The cause was a faulty control unit sending incorrect signals to the BUS system. It was definitely a complex problem that took some time to diagnose. After a few tests, the mechanic determined that the control unit needed to be replaced. It was important that the new ECU was fitted and programmed correctly to ensure that the problem would not recur. It was a serious matter as the ECU plays a central role in the functioning of various components of the vehicle. But after the ECU was replaced, everything worked fine again. Hope this helps you! Best regards.

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Hi, thanks for the quick reply and the informative report on the same problem with your Citroën C5. Seems like replacing the ECU could really be the solution. Do you happen to remember what the repair cost was at the time? And have there been any further complications since then or is everything running smoothly again now? Looking forward to your answer! Best regards.

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Hello, you're welcome! First of all, since the new control unit was installed, everything has been running like clockwork, so communication between the control units is no longer disrupted. However, your wallet will be less happy, as the bill at the time was around €1000. Replacing the defective control unit and rectifying the faulty signals on the BUS system has its price. But hey, things have been quiet since then, so the investment was worth it. Hope this helps you! Best regards.

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Hello, many thanks for the further help! It sounds as if the investment was worthwhile, even if €1000 is not a small amount to begin with. But of course I want my Citroën C8 to run smoothly again and remain reliable in the long term. So I will definitely consider replacing the control unit. Thanks again for your valuable input! Best regards.

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2016 citroen c4 grand picasso 1.6 bluehdi electric handbrake does not work.

Start by checking the fuse related to the electric handbrake system, as a blown fuse could prevent it from functioning. If the fuse is intact, inspect the handbrake switch for any visible damage or loose connections. Let me know how it goes or if you have any further questions!

I've checked all wiring from both rear actuators but not damaged. Then I've tested actuators which were both working. I've also installed a new parking brake switch and a new battery. Still no luck.

Since you've already checked the wiring, actuators, and replaced the switch and battery, the next step would be to inspect the electronic control module for the handbrake system. There might be a fault in the module itself or a software issue that requires reprogramming. It's advisable to have a professional diagnostic tool scan for any error codes that could pinpoint the problem. Keep me updated on your progress or if you need further assistance!