new to me prostar codes

[cbsd]

ive got and 11 prostar with isx. bringing it home slowed down for a town and went to speed back up and seemed like the engine was slow to respond and engine warning light came on for a couple miles. i basically let off the gas and took back off and everything seemed normal. the light came back on a short time later but when off in a couple more miles and good the rest of the way home. i check the diagnostic codes when i got home and learned how to and these were the codes.
spn2791 fmi7 oc3
spn1209 fmi16 oc1
spn 102 fmi2 oc1

figured one of these has something to do with the engine light

thanks

btw this is my first post to this sight. i was always taught to surround myself with people smarter than me and seems like theres some smart ones on here!
ive got an 06 volvo with an isx that was leaking oil in the coolant. the head had an oil leak in the back left corner so decided to pull the head when changing the oil cooler. found this sight halfway through the project and was very helpful