My 99 Outback Legacy just threw another Evap code- 440. I replaced the filler tube and valve and had no problems for 2 months. Last night on the highway the "check engine" light came on another evap code. The fuel was at about 1/4 tank which is where the code occurred before. I'm going to check and tighten the pressure lines and yes, the gas cap was tight! Any more thoughts? Thanks