Runs rough. What happened?
 

I have a fairly new-to-me 2002 Boxster base with the 2.7 and 223,000 miles. While sitting at a red light yesterday, the car died and siunded very odd when trying to crank it. I was afraid maybe I was experiencing an IMS failure. I pushed it out if the road and after a couple of minutes tried it again and it started but ran very rough. I drove it home with the cel on and it periodically flashed. I checked the codes when I got home and had: p300,301,302,303, and 343. It will still start but runs rough. Anybody experience anything like this? Where do I start? Could it be as simple as a wiring issue with the cam position sensor or a bad sensor?

I had a similar thing happen. The MAF cover came off and stuck in throttle body. Ran but real rough.
New MAF runs great.

Those codes indicate misfires on bank 1, and the bank 1 camshaft position sensor reporting an out of limits issue. Could be wiring, the sensor, or it could be correctly reporting a timing issue.

https://rennlist.com/forums/boxster-and-boxster-s-986-forum/797262-986-boxster-s-02-p0343-camshaft-sensor-code.html