 I got a ton of codes from my 93 Seville STS
Hi, i am currently having a rough idle, and my car just started overheating. I can only drive a short distance before it overheats. When i got home and still had it on and parked it seemed like the fan was on so i assume it is the thermostat? Also i get a slight hesitation going from 2nd to third. It has always down it since my uncle had a brand new tranny put it in about 4 years ago.
Anyways i pulled all the codes, and have no idea what any mean, any help is greatly appreciated. Oh, also i recently got that abs and traction control light thing, but it went away after restarting, and my traction control was working fine in the snow.
CODES:
I039 (current)
P030 (history)
I032 (history)
A050 (history)
T023 (history)
T021 (history)
Again, any help on any of my problems is greatly appreciated.
P.S - I dont think i am a complete moron when it comes to cars, but i am no where near a mechanic, so please in simple terms. | 
