Audi A3 check engine light Loss of power and misfiring

Hey, had a similar problem with my Audi A4, year 2010 (also gasoline). I have some experience with cars, so here's my two cents: I had a faulty engine control unit. The symptoms pretty much match what you describe. I went to my garage, who confirmed the problem. In the end, I had to pay 1000 euros for the repair. New engine control unit in, a few checks, and that was it. Now it's purring like a kitten again. Which exact models and model years are affected? Maybe a few more specific tips will help you. Good luck!

(Translated from German)

Thank you very much for your answer. My A3 currently has 103456 km on the clock and has been regularly serviced in the workshop. I will definitely discuss your tip about the engine control unit with my garage. Do you have any other tips on what I should pay particular attention to when diagnosing faults in my model?

(Translated from German)

Hey again, I'm glad that my answer has helped you. Given the number of kilometers and the regular maintenance, that speaks for good care of your Audi. I would recommend that you pay particular attention to the following points: 1 **Check spark plugs:** Even if you are looking at the ignition coils, the spark plugs could also be causing problems. If they are worn or sooted, this can cause similar symptoms. 2. mass airflow sensor (MAM):** If the MAM is not working properly, your engine is getting incorrect airflow data, resulting in rough engine running and poor fuel economy. 3 **Fuel filter:** A clogged fuel filter can affect the fuel flow, leading to loss of power and jerking. 4 **AGR valve (exhaust gas recirculation valve):** These things tend to get clogged and cause poor combustion and rough engine running. 5 **Software update:** Sometimes software problems can also cause such symptoms. Ask your garage whether there are any current updates for your model. 6 **Fuel quality:** I have also had problems due to poor quality fuel. Maybe clean the tank thoroughly and try different gasoline. Keep your fingers crossed that you find the fault quickly and can rectify it! Keep us up to date, I'd be interested to know what it was in the end. Best wishes and good luck!

(Translated from German)

Many thanks for the detailed tips! I'll definitely keep an eye on the points mentioned and bring them up at the garage. I'll have the spark plugs and EGR valve checked in particular, as I hadn't had this on my radar before. A software update also sounds like a good idea, I'll ask about it the next time I visit the garage. If it turns out that it's actually the engine control unit or one of the other points you mentioned, I'll definitely get back to you. Thanks again for your help and the detailed information! Best regards and thanks again!

(Translated from German)