what do I do to fix a 0456, and 0457 code

Question

replaced the fuel cap, and had the code reset, now it has a code of 0456 a very small leak detected with 0457

Answer 1

Hi there,

The codes are basically for a loose fuel cap or small evap leak. Usually if replacing the fuel cap doesn't resolve the issue, then a smoke test should be done to locate the source of the leak, then the repair.