Check engine light on idle fluctuates 400to1500 ran codes 12,22,32,33,55

It ran great before this. So yes something happened for sure. How do you reset codes? By just unhooking positve battery cable for a minute?

Try it or if it runs u can go to part store and buy 1 or have them reset,

It still runs good unitl you let up on accelerator then it slowly idels down to where it almost dies then raises up to about 1500rpms. It will set and idle like that up and down. When i shift gears it wont immediately decelerate like it should when you take foot off pedel.the 32 code is ecm does not see closed throttle.33 is isa circ,55is coolant sensor circ hi,22 starter relay circ low and 12 is mpa circ low thats why i thought it was due to scuffrd wires. It still runs down the road ok besides when you shift or stop.

You have to reset then see what comes up...thats what i would do , i have a hand held 1 from mac man , it was 60.00$ all my friends call now,"come over reset my light of tell me whats wrong" there cheep at the part stores, code readers...