codes p0440 & p0456. where do I look for the pboblem?

Question

where in the emission system would I look at to find the problem?

Answer 1

HI there,

Any time you have a code for an evap leak, the best place to start is with the gas cap. Make sure the seal is good on it and the filler neck isn't all rusty. If it all looks good, then the next step is a smoke test. This will locate the leak, then you can do the repair to save money. Otherwise you can replace a lot of parts without success costing more then the smoke test would