Engine Failing? 2007 Prius

My Prius has been acting strangely. It started with the engine not staring right away one day after I pushed the button. Instead the check engine light came on and it sounded like it was straining and then the engine started up and the light went off.

I never changed the oil since I got it, it had been about 6k since then, so I got an oil change. Engine seems to turn on more when idle like at red lights.

When I turn off the car, sometimes it turns right back on with the check engine light coming on. When I hit the button again it turns off. Next time I turn it on, no check engine light.

I did check the codes when this happened but my small reader didn't pick up any codes. I may need to try techstream next time it happens in case it can detect more.

Not really sure if I'm just hitting the button too fast, hard, etc. sometimes or what's up with it. Other times it runs just fine. Seems to do worse in the heat but may be my imagination.

Possibly unrelated, had my traction light come on and car be a little swervy for first time lately, three times now. One on gravely road, another on a turn, and one on windy roads. Could just be coincidental timing and it works fine?

Any help would be appreciated!

 

I just checked with Techstream, no codes.

 

I'm not sure. What should I do next? Besides forking over my arms and legs to a mechanic if I can help it.