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I have a 06 Audi A4 quattro 2.0t. Had it for about 5 years....out of the 5 years it only ran good for a couple months....
Right now it has a rough idle and will stall if I put any strain on the motor (A/C, turn) without stepping on the gas. EPC light is always on and the engine light also. Theses are the codes it's throwing:

00579-Knock sensor 3

My scanner doesn't know what the other codes could be. I'm not sure what scanner would be best to diagnose it...

So far I have replaced both 614 relays, high pressure fuel pump, cam follower, throttle pedal, and knock sensor #3. I replaced the turbo about 2 years ago.

I am at a loss to figure out what it could be. I see other forms and individuals having the same issues but I don't see any fixes or solutions. I'd like to get the car running again since it's been giving me issues for so long.
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