Inregards to why the Audi valve lift 2.0T engines have issues have more problems is tough to say. Its often confusing as Audi and VW use the terms FSI, TSI and TFSI which gets pretty confusing. While the valve lift 2.0T engine says TFSI (on A4 and A5 models others too) it is very different from the TSI engine. Readthe definitive used Audi A1 2010 - 2018 review from What Car?. These started with a 1.2-litre petrol unit, which was in time dropped in favour of a 94bhp 1.0-litre three-cylinder TFSI Theengine problems with the B8 were due to poor engine design rather than reliability. This looks also to be the case at first glance with the B9. Reactions: Tfsi gone. I hope Audi sort the 2.0 TFSI issues out, unlikely as there now in production. I don't really fancy the diesel route again, too many short journeys. Received525 Likes on 350 Posts. B9 2.0T Engine Reliability. I'm likely going to be in the market for a 2019 A4/A5 or S4/S5 and am looking for feedback regarding the reliability of the 2.0T used in the B9 A4, A5, and Q5. I have a 2011 A4 that has been reliable except for excessive oil consumption, which plagued the 2.0T for several years. Jumpon the gas from a light and there is a little bit of turbo lag at the lower revs, but boost builds quickly and the engine has good response above 3,000 rpm. It drives like a bigger car on the TheBUL engine came in the DTMs as well as the special edition. If the book or quoted figure is 220hp then it has a BUL. The only main concern would be the pick up as suggested or the chain and tensioner at the rear of the motor. The chain and tensioner are more prone to having issues around the 85-100 k miles mark. HIive got a 2006 tt mk2 2.0 tfsi s-tronic ive had a miss fire at idle its fine when driving .The engine management light came on today for the first time so i put my code reader on it an got the codes below. P0642 Voltage circuit A low voltage (ECM) P0304 Miss fire cylinder 4. Engines& Performance: A mere 7% of the TTs reported on had any issues – all relating to the air-con system – and all of those were resolved at no cost to owners. Audi TT 2.0 TFSI S Y4kkJq.