i'm sorry, my engilsh it's not very god.

My oil light went on while i was driving on the highway, cruise controll at 85 miles/h.
The oil level was ok, but i added some more.
The oil lamp went off...after a few miles went on again, this time with a check engine light.

The error is:

evaporative emission system leak detection pump sense circuit range/performance

(I searched but i didn't found any information about this cel)

reset the ecu... i drive it with 65 miles/h ...no more cel or oil light.

A few days on my way back from seaside...oil light went on at 90 miles/h agian

every time i shut the engine down...the light goes away.

The car runs fine...

HELP!