Code 02 is nothing to worry about, it just means that the ECU was recent recently. Normally it goes away once you turn the truck off.
Code 17 indicates a failure of the throttle position sensor. Easy to replace, but a bit spendier than it needs to be... $60 or so for the part depending on where you go.
My oil line fix
My 100k stopped odometer fix
Brace for impact, I'm in a "modifying mood". Massive thread count inbound.