The Reduced Engine Light displays every time the car starts, the car seems to have little power while attempting to drive and the engine violently vibrates as though the car is about to breakdown
The Reduced Engine Light on 2005 Saturn Ion
Tow, if necessary, your car to a Saturn or GM specialist for diagnosis. the light indicates that the computer has detected a malfunction with the engine control and emission systems. There are data and trouble codes stored which can be accesssed using a scanner and would be valuable information for diagnosing your car. Here's a directory link for you:
My car did the same thing it was the converter on the exaust. My car would run bad on and off. Then I got reduced power light and check engine light. Clogged converter stops the flow.