Periodically started getting 1412 code along with the occasional jets engine sounding SAI pump. I took the SAI pump off and changed the filter (Ps: broke all three mounts and had to replace so the rubber on these things definitely goes bad). Also changed out the Purge Valve with the Hyundai equivalent part. Looked exactly the same!. Now I still have the 1412 code but in addition I have a 1415 code. I am going backwards and not sure what else I can check. Looks like all vacuum hoses are connected. Any help would be greatly appreciated.