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SteinWerner

Audi Q3 check engine light lights up/flashes and misfires repeatedly

Unsteady engine

Black smoke from exhaust on acceleration

Shaking while idling

Check engine light on

Stalling while idling

Poor fuel economy

Jerking on acceleration

Car won't start

Loss of engine power

Hello everyone, my Audi Q3 (built in 2012, gasoline) is showing some unusual symptoms: black smoke from the exhaust when accelerating, engine light on, loss of power, unsteady engine, jerking when accelerating, starting problems, high fuel consumption, stalling at idle, vibrations at idle. I suspect that the ignition coil is defective or that there are misfires. Has anyone had similar problems and experience of how this was rectified in the workshop? I would be grateful for tips and your insights!

(Translated from German)

4 comment(s)


Lehmann91

Hey, I had a similar problem with my 2014 Audi Q5. I have a little experience with cars, but no expertise. I had black smoke coming out of the exhaust, loss of power and a jerky engine. I took it to the garage and it turned out that the engine control unit was faulty. The repair cost me 1000 euros, but after that everything ran smoothly again. If your ignition coil or other parts are affected, I would still recommend having a professional diagnosis done to find the exact fault. Can you provide more details about your vehicle (mileage, last inspection, etc.)? Then I may be able to help even better. Good luck!

(Translated from German)

SteinWerner (Author)

Hey, thanks for your answer! My Audi Q3 has just clocked up 104567 km. The last inspection was about two months ago. Could it also be the mass air flow sensor or the fuel pump? I will definitely have your idea about the engine control unit checked. Thank you and best regards!

(Translated from German)

Lehmann91

Hey, no problem! With 104567 km on the speedometer, there could indeed be several causes. As you suggest, it could also be the mass air flow sensor or the fuel pump. I once had a similar symptom with my Audi Q3 (built in 2012, gasoline), where it also ran unevenly and there was a lot of black smoke. In my case, it was the mass air flow sensor that was defective. The garage then replaced it and it cost around 300 euros, but after that the car was fine again. A blockage in the intake tract or a problem with the injectors could also cause such symptoms. It may help if you mention several possible causes to the garage. My tip: Tell them what you have read here, they can then take a closer look. Keep us up to date on how things progress for you! Good luck and best wishes!

(Translated from German)

SteinWerner (Author)

Hey, thanks for your tips and experience! I will definitely let the garage know about this and address the possible causes such as the mass airflow sensor and the injectors. It's really reassuring to know that others have had similar problems and that there are solutions. I'll keep you posted on how things progress. Best regards and thanks again!

(Translated from German)

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