I've seen similar posts here, but my 2000 elantra is having trouble shifting into 4th. Codes are P0734, P1624, and P0713. The first one is new, the other 2 were there when I got the car 18 months ago. All 3 have this in common: "possible open or short circuit condition". Is it likely that there's a problem in the wiring harness or is it more probable that the tranny is shot? Thanks!