1996 Dodge Caravan
Service Engine Soon light on flashes a 1 2 4 3 5 5 code when done with key. Reads misfire cylinder 2 when read with computer.
Have changed spark plugs wires coils distributor cap rotor button cleaned injectors fuel additives to clean system. Each time light cleared after work is done it drives for less than 10 miles and comes back on. Idles really bad and struggles to shift when in a pull.

 

Get the actual codes read with a code reader and post them here. I have no idea what that sequence of numbers means.

 

12 = battery disconnected blah blah

43 = Ignition coil faults or cylinder misfire

55 = End of codes

Code 43 is the relevant code. That's the equivalent to the P0302 (misfire cylinder #2) code with your scanner (computer). Lack of spark, fuel or compression will cause the code to show up. If you're sure you have spark and fuel at #2 a compression check is next.
https://www.obd-codes.com/p0302

 

What should the compression be?

 

You have an OBD2 vehicle right? Those codes are OBD1....OBD2 is P codes. scratching my bald head here.......

 

He's giving us the two digit MIL codes you get when you do the key dance. Those correlate to what I posted in my previous post. He also states he gets a "#2 cylinder misfire code when read with a computer". I'm assuming his "computer" is a scanner or code reader and he's getting the corresponding P0302 "P" code. That is why he's seeing a MIL code 43 on the key dance. Gotta agree though. It would be best to stick with the 4 digit OBDII codes.