Car starts fine in morning but after i drive a few miles and turn car off sometimes it doesnt start it can take anywhere between 40 min to 3 hours to start again ....what is causing this ...i have one code 0445 2008 saturn aura xe 3.5

Hello, a no start for such a long period sounds like fuel delivery related - like the fuel and air mixture are off and you aren't getting enough fuel delivery to get the vehicle started. I'd recommend a fuel pressure test; also checking the air intake system would be important. I lean towards fuel because fuel pump and delivery issues don't usually generate a trouble code. P0445 refers to the purge control valve in the evaporative emissions system. I don't see this causing a no start - but I suppose if the fuel tank is not allowed to ventilate properly there could be a concern with fuel delivery? That's a stretch... Still it's important to repair what you know to be wrong before guessing elsewhere. I would suggest some hands on testing - especially when the problem occurs, including fuel pressure testing. https://repairpal.com/auto-repair-near-me