Ive got a 2000 civic DX 4 door. It is inspection time for me here in New York and I obviously cant pass with a check engine light. I went to autozone and got 2 error codes, both p1457, and it said something emissions related.

Ive read a few forums and they said it could be a number of things, Im not really sure where to start, and I know that when NY does the inspection, it wont pass because they can tell that the code has been cleared.

Any ideas what to do guys? Where to check first?? etc

Thanks