How to Fix a P0446 & P0451 check engine light trouble codes for a Pontaic Chevy Buick Toyota or Honda car. With a simple $20 ODB2 code scanner you can reset these trouble codes, most of them lead to an easy $15 new gas cap. Quick and Easy fix to these check engine light trouble codes P0446 and P0451 EVAP codes.
Link to ODB2 Reader:
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Brian, I don't think that's how it works. You just cleared the codes so it's going to take a few days or even a week, depending on how much you drive the car, for the codes to appear again, isn't it?