Engine knock
 

Hi,

My girlfriends 2000 Toyota Camry has a not ever so slight knock to the engine....I was thinking at first that it was pulling some kind of rod, but it sounds different, and only truly apparent at idle and wide open throttle....

Its also throwing P0401 (EGR Insufficient Flow) and P0770 (Shift Sole Malfunction) codes, so maybe they have something to do with it??

I'll try to post a vid later...

Thanks!