I discovered the check engine light on my car today and the glow plug is flashing.I drove to my friend's house and read the vehicle.The error was that the turbo control was defective/insufficient.My friend said it could be the vacuum pump/vacuum box and said I would have to replace the turbo because the box isn't that interchangeable.Now my question(s), after I have searched the forum for a long time and have not become entirely conclusive.- If it is the vacuum pump or vacuum unit, can I simply replace it or is it permanently installed on the turbo and can it only be replaced with the turbo?- Can it have other causes?What should I look for?Audi A4 B8 2.0 TDI 136HP BJ 2011Thank you for your helpCan you post the filed error in the original text, preferably read out with VCDS?Motor should be the CAGB?@CAHA_B8 wrote on June 25, 2022 at 10:18:56:Can you post the filed error in the original text, preferably read out with VCDS?Motor should be the CAGB?I'm going to read it again today, possibly not until Monday.However, my friend only has an OBD connector for his cell phoneJust had to google what VCDS is, unfortunately it doesn't have anything like that.Is that still enough for you?@HackeltoN wrote on June 25, 2022 at 2:21:21 p.m.:@CAHA_B8 wrote on June 25, 2022 at 10:18:56:Can you post the filed error in the original text, preferably read out with VCDS?Motor should be the CAGB?I'm going to read it again today, possibly not until Monday.However, my friend only has an OBD connector for his cell phoneJust had to google what VCDS is, unfortunately it doesn't have anything like that.Is that still enough for you?Other than ODIS or VCDS will not help you purposefully.At Audi there's only the ATL complete.The accessories include boxes with rods.However, this must be set precisely with the ATL.How do you want to do that?OBDII: Turbocharger (TC) boost control position sensor - range/performance problemThis is what came out of it.If I understood that correctly, I have to go to the friendly and have the part read out, correct?I think P2563 points to the vacuum system.Is this a replacement part or do I have to have the entire turbocharger replaced?Have the cables and vacuum hoses been checked?@HackeltoN wrote on June 27, 2022 at 04:41:17:Is this a replacement part or do I have to have the entire turbocharger replaced?As CAHA_B8 already wrote, first check the simpler things, such as the hoses.In the petrol engine, however, the pressure cell works with a small (!) overpressure.I think it's the same with the diesel.Apparently you don't have VTG.Then I would be out.If you have a turbocharger test bench, you can do it yourself.As @Arpaio has already written.There are a few cans for sale in the bay, I can't say what the quality is like.Costs around 150-200 euros.https://www.ebay.de/itm/283603820296Otherwise, a complete turbocharger at Audi costs €1300.Get an answer within 90 minutes from Europe's largest car and motor community with over 50 million posts.