Audi Q2 Diesel 2010: Black smoke, high consumption and unsteady engine performance - advice needed

Hey. Had a similar problem with my 2012 Audi Q3, I have limited experience with cars so I took it to the garage. They told me that the fuel pressure regulator was faulty. The repair cost me €255. Can you give me more details about your car to help you better? Maybe mileage, whether you've already had a diagnosis and whether you've had similar problems before.

(Translated from German)

Hey, thanks for your answer! My Raudi already has 158431 km on the clock. I only had the last inspection recently, but the problems started after that. I haven't done an exact diagnosis yet and luckily I've never had such problems. Your information helps me though, thanks for that! I just hope that the repair won't be so expensive for me.

(Translated from German)

Hey, no problem, I'm glad if I can help! With the mileage, it's quite possible that some parts are starting to cause problems. Since you say the problems occurred after the last inspection, they may have missed something. Maybe your next step should be an accurate diagnosis so you know what exactly the problem is. In my Audi Q3 it was the fuel pressure regulator, but it could be something else. But don't worry, even if it is the fuel pressure regulator, the repair is not the most expensive and can also be done at many independent garages. The cost can of course vary depending on the garage and region, so it's difficult to give an exact price. However, it is important that you have the problem fixed as quickly as possible. The symptoms you describe could indicate serious damage to the engine if you leave it unresolved for too long. So it's better to go to the workshop sooner rather than later. Hope the information helps you!

(Translated from German)

Great, thanks for the advice! It makes sense to make an accurate diagnosis and not wait any longer. Then I'll decide whether to have it repaired or perhaps look for a new car. Your information was very helpful and reassuring! Hopefully the repair costs won't be too high. Thanks again for your help!

(Translated from German)

Hi there! Your issues may indeed be related to the fuel pressure regulator or could involve the EGR valve or turbocharger. It's best to run a diagnostic scan to pinpoint the problem. I would have a mechanic check for clogged injectors or faulty sensors too. Hope this helps!

Given the symptoms you've described, it's also possible that your diesel particulate filter (DPF) could be blocked. This can cause black smoke, reduced power, and increased fuel consumption. I recommend having this checked by a professional as well.

Carly says that I have a problem with the solenoid valve of the Servotronic, what could it be?

(Translated from German)

It sounds like the Servotronic solenoid valve in your car might be malfunctioning. This valve controls the power steering assistance based on the speed of the vehicle. If it's faulty, you may experience issues with your steering. It's a safety-relevant issue, so I recommend having it checked by a professional mechanic as soon as possible. After the check, could you please update us on the progress?

I have a problem with my Audi A7 2013 biturbo. It just went off on the highway, I want to turn it on, but it won't come on. Error code is P229400. Control valve. It no longer starts but has contact and everything.

(Translated from German)

The error code P229400 indicates an issue with the turbocharger or supercharger A control performance. This could be due to a variety of reasons such as a faulty control solenoid, a damaged turbocharger, or a leak in the air intake system. I recommend starting with a visual inspection of the turbocharger and the air intake system for any visible damages or leaks. If you don't find anything, you might need to have the control solenoid tested. This should be done by a professional mechanic to ensure safety and accuracy. After the inspection, could you please update us on the progress?