Drove to Mississippi and back this past weekend and got the yellow engine light on the way back. truck even acted like it wanted to stall and bucked a little at one point but then cleared up. Light went off yesterday and is running fine now. Checked the codes today and got the below codes. Can anyone help me out and tell me what I need to be looking for to either replace or fix etc. Truck is an 04.5 3500 4x4 with 101,000 miles. Had 100k warranty on it and all was well until now, just the luck right?

Codes:
P0652
P2121
P0193
P0341

Any help is appreciated.

Spye

 

2121--Pedal Position sensor 1/performance
0193-fuel rail pressure high
0341-cam position sensor performance

any mods to truck???

 

P0652 - Low voltage at the #1 sensor supply circuit

 

Thanks guys, to answer any questions about mods, there are none. I put a smarty on to try it for a week and then removed it about six months ago. All I want to do is find out where I need to look under the hood to fix/diagnose what went wrong.