Ah P0442

[lipunx]

I got this engine code about a month ago. It keeps coming back even after I changed the gas cap. Hoses look good so I'm stumped...

[DANNiE]

you may have a leak in the evap system somewhere... you need a special machine to "smoke test" the evap system...

basically its a non toxic non flamable type smoke and it fills the fumes area in the sysytem and you will see smoke coming from the leaking area or component.