Epc light on 06 gli

Mkv 06 gli epc light is on . Did a smoke test no leaks but wideband is reading 17.4 and I have a shit load of codes . Sounds like a fueling issue to me but I need some help . All this happened after I fell in a pothole . Don't know else to try . My exhaust is lettin off shots n backfiring like there's no 2mm


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