u/UpsetConnection3478

Has anybody experienced this issue and successfully fixed it? …. Back up camera , pdc , rear windows do not work . Car acts like it doesn’t have or hasn’t been equipped with any of these features . Fuses look good as well . No warning lights , no check engine etc etc . Please let me know if anyone knows how this could be fixed . Thanks

Car has oil filter housing done & valve cover gaskets done as well . It has a stage 1 downpipe as well with burbles any idea what this might be ????