so ive searched and read all the 1457 threads (inc billmans) and I've replaced all four of the common parts (canister, its close valve, the 2 purge valves off it) and still getting the code. Has anyone had to replace any other part in order to permanently get rid of the 1457? unfortunately I don't really have anywhere to work on my own vehicle, so testing is a bit hard (which is part of why I started with just throwing parts at it)

EDIT for anyone as stuck as I was: FINALLY FIXED IT, was a second defective purge valve. replaced the purge valves in front of the canister and one of the replacement parts was bad.

 

Did you also replace the hoses?