ok i have a 98 gst with 43k miles and the check engine light came on. everything seems to be functioning correctly. it turned on after i was allowing the oil to drain from the turbo (i need a turbo timer) it was just sitting in neutral and the light was on when i came back. I think its the oil pressure thats low but my oil it self is not low. i dont know whats wrong plz help

 

i found out it was a leak in the oil filter housing gasket, but know that i fixed it its smoking like hell out the back.