Has anyone diagnosed this code? have not found a lot of info on it. I know it is an emissions code but nothing deeper. Thanks Skip

 

po440 is a leak in your evap purge system check your gas cap first. then perform a leak test of the evap purge system should not leak down more than 5 mb over 1 min. if it is indead leaking then install a smoke machine to the system activate the charcole cylinder shutoff valve and start pumping smoke into the system where ever the smoke comes out is your purge system leak.