Everybody points to the Engine Computer when they don't know what else to do. They really don't cause that many problems.

When the Check Engine light is flashing that means too much raw fuel is going into the exhaust system and is going to overheat the catalytic converter. Also, there will be a diagnostic fault code in the computer. Chrysler makes reading them real easy. Cycle the ignition switch three times from "off" to "run" within five seconds, leave it on, then watch the codes show up in the odometer display. Those codes will indicate the circuit or system that needs further diagnosis.