BraunRacer

Peugeot 508, model year 2015: Symptoms and possible causes of black smoke and power loss

Hello everyone, I currently have a problem with my Peugeot 508, built in 2015, diesel, already 79392 km on the clock. There is black smoke when accelerating, the check engine light is on and the engine also seems to have less power. In addition, the car twitches when accelerating, there is a loud hissing noise when accelerating and the fuel consumption is significantly higher than normal. I have also noticed a strong exhaust smell and I can hear a miserable whistling noise. I assume the problem could be coming from the charge air temperature sensor, but I'm not sure. Have any of you ever had similar problems? How did your garage handle it? The last one wasn't a great experience with the garage, so I'd like to have something to go on before I go back. Thanks in advance for your experience and advice! Best regards

(Translated from German)

4 comment(s)

Hello, I had the same problem with my Peugeot 3008, year of manufacture 2018. Attention, it seems to be a bit more complicated. In my case, the evaluation electronics, i.e. the engine control unit, was defective. Now the car is running smoothly again: no black smoke, no hissing noise and no more whistling. Power is also back and fuel consumption is back to normal. It's not a simple replacement. The workshop had to take a closer look to discover the faulty control unit. It was serious, but don't panic, it was repairable. The good news: after that, all the symptoms were gone. It's certainly worth a look to see if you might have the same problem. Good luck! Best regards.

(Translated from German)

Hey, Wow, that sounds like a pretty freaky problem, and you were lucky to get it fixed! Can you tell me how much it cost you to get this engine control unit fixed? And has there been any other trouble with your Peugeot since then that might be related to this problem? Thanks for the info! Regards.

(Translated from German)

Moin, yes, it was certainly a search for clues, but it turned out well! The repair of the engine control unit cost me €1000. Since then my Peugeot has been purring like a kitten with no further problems. And I think your guess about the charge air temperature sensor was spot on: there was also a malfunction that was dealt with when I took the car to the mechanic. On the whole, the car has been running really well since then, no more smoke signals and the hissing and the miserable whistling are also history. So, I would recommend that you check these pitfalls with your mechanic. And don't worry, it may have been expensive, but it was definitely worth it! Best regards.

(Translated from German)

Hey, thanks for the detailed answer! That's quite a lot of money, but if there are no further problems afterwards and the car runs smoothly again, it seems worth it. I'll take your advice to heart and talk to my mechanic about it. Let's see what comes of it. Your experience is very valuable to me! Thanks again and have a nice day! Regards.

(Translated from German)

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