Check Engine Light 99 Sonata
 

Hello,

I keep getting a check engine light (usually about the time when the gas
light is going to turn on) and it comes back with codes: p0442 and/or
p0455 (both for evap issues).

I spoke to someone with a 01 sonata and they had the same problem but had
it fixed under warranty and don't remember what the trouble was...

I know there are no drivabilty issues with these codes but, it is getting
annoying having to reset them all the time.

What is USUALLY the problem and where should I look... I don't want to
take it in if I don't have to because they will charge an arm and leg to
just "diagnose" the problem even after I tell them what the codes are.

Thanks for any help