codes
I have a 1997 Dodge Dakota with the 5.2 engine.It has started to run rough and the check engine light is on.I do get trouble codes 12,21,and 55 but done know what they mean.I have put plugs,wires,cap,and rotor in it early spring this year just as maintenance.The truck has just shy of 300 thousand miles on it.Can anyone help me with the codes or other ideas?Thanks