My Neon, 49k miles, recently has activated the check engine light. Advance Auto read the OBDII and got a code ?PO456 EVAP Emission Control System Leak Very Small? - I believe that is the correct code, I transcribed it into my maintanence log and no longer have the original printout. I know the description is correct although something tells me I might have transposed a number. Anyhow...
I checked the gas cap and later replaced it. I checked all the hoses I could find under the hood. The large hose from the throttle body to intake manifold was loose (left that way by the dealer a couple years back when the rebuilt the transmission I believe) so I tightened it. Air cleaner is new and properly seated in place. I found no loose or cracked hoses as far as I could see. If I clear the light by lifing the battery lead it will stay off for about 2 weeks and then come back on with the same code.
The local dealer has provided most unsatisfactory service on the numerous times the car was in for warranty work so I would rather not return it to them. I would appreciate any advice as to other things I might check. My other, and probably better, alternative is to trade the thing in on a Toyota.
Regards,
Ken