Problems with check engine light and starting difficulties with Citroen C5 Diesel (2013)

Hi mate, listen, I had a similar problem with my 2011 Citroen C4 diesel. I'm not a car specialist, but I have had some experiences. My car sometimes just gave up the ghost. The reason for this in my case was the so-called 'engine control unit', it was completely defective. At my garage, they plugged in the diagnostic device and read out the fault. They then replaced the part, which cost me around 1000 euros. After that, everything worked perfectly again! But I need more information to be able to help you better. Have you noticed if there are any specific conditions when the fault occurs? What are your driving habits? The exact situation can help me make a more accurate guess.

(Translated from German)

Thank you for your answer. My mileage is currently 29289km. It hasn't been long since the last service, so that shouldn't be the problem. Regarding your questions, the fault always occurs sporadically, with no particular pattern. I mainly drive short distances, but occasionally also longer highway trips. It's really exasperating!

(Translated from German)

Hey, thanks for the further information! It was similar for me. After all, we have almost identical vehicles, and the way you describe it is very reminiscent of the situation with my car. Sounds to me like a problem with the engine control unit, as it was in my case. By the way, short journeys are really quite stressful for such parts, so maybe that contributed to it giving up the ghost in your case. I recommend that you definitely have it checked at a garage if you haven't already done so. Of course, it could be something else, but it's difficult to say from here. Replacing the control unit helped me back then, but it doesn't have to be exactly the same for you. Maybe you just need a software update, who knows. If I were you, I wouldn't hesitate too long and have the matter clarified in a workshop. It may cost a little, of course, but you'll be safe and your car will hopefully be running smoothly again soon. Good luck with that!

(Translated from German)

Thank you, that really helps me. It's a real relief to find someone who has had a similar problem. I will follow your advice and take my Citroen to the garage. The cost is annoying of course, but what the heck - safety first. I hope it's nothing too serious and my car will be back on the road soon. Thanks again for your support, it's really great of you!

(Translated from German)