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Hi guys I have a 2007 s6 with 100k miles . I had Audi install a new engine and I've got this epc p3028 code I have to reset the throttle bodies and clear the codes . Every 15 days but lately it's down to 4 days ...it's to do with communicating with or throttle body operation . The TB wire overlay was done 4 yrs ago on lh tb and dec 2015 on rh side. Is it most likely the tbodies that needs to be replaced at this point ? Really appreciate the feedback as I've spent a lot of money on this car apr tune , pre cats gutted . I want it to work as it should .