The whole list is here:
Stealth 316 - Reading Diagnostic Codes - 1991-1993 3S models
13 Intake air temperature sensor
14 Throttle position sensor
21 Coolant temperature sensor
22 Crank angle sensor
25 Barometric pressure sensor
13 and 25 are built into the MAF sensor on the air cleaner, I've had them show up if you turn the key to ON (or try to start it) with the MAF unplugged.
I would clear all the codes since you don't know how old they are or if they're related and see which ones come back, and when.