Misfire/lost of power

[Veeizzlb7s4]

I have a 06, B7 S4 with about 130k i starting getting misfire and loss of power . So i changed the coil and plugs with an after market coil hudson i believe . Afterwards still same so i thought it was the aftermarket coils so i bought dealer oem coils still same what could it be also getting powertrain code

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