I got a new Autel 808 to check out an engine system failure warnings. Got two trouble codes: P2407 Evap system detection pump sense circuit intermittent/erratic P0455 Evap system leak detected-large leak Cleared both and have not seen the issue again so far. Anyone seen or experienced these problems? What are the remedies if I dare ask?
First place I would look is gas cap seal. After that look in the engine bay for obvious loose intake connections. After that, smoke test but that me be a little more involved for some.
