Problems with engine light and DPF regeneration failure on Peugeot 407 Diesel, model year 2010 - Possible exhaust back pressure sensor fault

Hi, I can very much identify with your problem. I had a similar problem with my 2008 Peugeot 308, I have a small amount of experience with cars and I spent most of my time in the garage trying to sort it out. In my case, the DPF was severely overcharged and I had to pay 1325 euros to fix the problem. It was a long road, but I finally got it fixed. Your problem could have similar causes. Do you see anything unusual under the hood? Or do you hear strange noises? In general, more information about the vehicle, such as how many kilometers it has driven, could be very helpful. Then I could give you an accurate answer. Hope that helps for now.

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Hey, thanks for the quick reply. I've already driven my Peugeot 41597 kilometers and haven't had any major problems so far. I haven't noticed any strange noises. I just need to go to the garage urgently, the last time was at about 40000 kilometers. But I'm interested to know what exactly you did to solve this? Did you replace or clean any parts? And were there any specific things I should look out for at the mechanic? Thanks again for your help.

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Hey, no problem! Well, in my case, the DPF (diesel particulate filter) had to be replaced. That accounted for a large part of the cost. The symptoms you describe could also indicate a clogged DPF. In your case, it might be helpful to have the condition of the DPF checked. The mechanic at the workshop can do this. Regarding your question about the exhaust back pressure sensor: Yes, that could also be a possibility. But as a rule, this sensor is not the main problem, it just shows that something is wrong elsewhere. For further details, I would trust your garage, as they will examine the exact condition of the car. It would also be important to know when your last oil change was. One final tip: next time you're at the garage, ask them to explain exactly what they're doing and why. This will give you a better idea of what needs to be done next time. I hope this helps you. Don't be afraid to ask if you have any more questions.

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Hi, your information and advice is really very helpful and makes my situation a little easier. It looks like I should definitely go to the garage as soon as possible and have the whole thing checked. Thank you for your assessment and the helpful tips on how to deal with the garage. As for the oil change, the last change was about 5000 kilometers ago. I will keep your advice in mind and ask the mechanics exactly what is being done and why. Thanks again for your help and quick reply. See you then!

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