Need help 2009 Audi A4 misfire

[euroocrew]

Las night I went over a speed bump and after wards heard a loud pitch noise (weird I know)
Popped the hood and it seemed to be coming from the engine near the throttle body
This morning I turned it on the high pitch noise is gone but the car is misfiring
And throwing codes
P0300 , P03001 , P03002 , P03004
I'm leaning more towards a bad throttle body , or would it just be bad spark plugs and coils?
Any help would be appreciated


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[Ang1dust]

Anythibg you do make it even out? Throttle while idle, throttle while accelerating etc?

[Dr. Awesome]

No expert here, but you could look at PCV valve as well. I was reading on this earlier and people have reported misfire codes among various others along with some cases of a whistling sound. You can check easily by opening the oil cap, just look up some videos. Easy fix if that is the problem, if yours hasn't been replaced, it would be good to do anyway!

[euroocrew]

Just an update, it turns out the PCV valve went out and would cause a misfire (very common on b8's )
Easy fix though on the 2.0 engines
Part was 80$ OEM and took about 20min to install


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