Sometimes I have a sometime hissing vacume leek on my 98 explorer

Question

and a po455 code what can I do to fix this, is it the vapor management valve?

Answer 1

HI there

This code is for a gross evap leak. This can be several things, starting with the gas cap or with the vent control valve. If both of those are good then you need to have a smoke test done to locate the issue.