Problems with Seat Leon 2012: Black smoke, jerking and loss of power - suspected fuel pressure sensor fault

Hi, I had a similar problem with my 2014 Seat Ibiza, which is very similar to your Leon. I'm not a mechanic, but I do have a bit of experience with cars. When I had the problem, I immediately went to my regular garage. The mechanic carried out a fault code scan and sure enough, the low fuel pressure sensor was faulty. This was exactly the problem you suspected. The garage replaced the sensor and everything ran smoothly again. I remember that I paid 172 euros at the time. One more question: do you have an OBD2 scanner to read fault codes from your car? Does the black smoke thin out after a while or does it remain constant? Any additional information could be helpful in advising you further.

(Translated from German)

Hey, thanks for your quick reply. I don't have an OBD2 scanner to hand at the moment. But maybe I can get one, thanks for the tip! The black smoke doesn't really thin out, but remains constant and is quite intense, especially when accelerating. I already have 174987 km on the odometer and was last in the workshop 3 months ago. I guess I'll have to go there again soon, won't I?

(Translated from German)

Hey, no problem, you're welcome! Uhh, that sounds like a serious problem if the smoke remains constant and is so intense. I'd recommend you actually go to the garage as soon as possible to get it checked out. Obviously there can be multiple causes for your symptoms, such as the fuel pressure sensor as you've already guessed, but other things like a faulty turbo or a clogged EGR valve can also cause these symptoms. It's a good tip to have an OBD2 scanner to hand beforehand to maybe see what fault codes your car is throwing. But again, please make sure you get it checked - a burning out engine is the last thing you need, and it could even be dangerous. And keep us posted on what comes out of it!

(Translated from German)

Thank you so much for your advice, really great of you. I'm definitely glad I posted this and really appreciate it. Seems like I should really get that OBD2 scanner before I head to the garage. I will definitely make an appointment as soon as possible and get everything checked. I'll keep you posted and report back on what comes up. Thanks again!

(Translated from German)