Service Engine Soon message on 2006 Cadillac DTS

What does the service engine soon light mean? Mine is actually a 2001 DTS

Asked by for the 2006 Cadillac DTS
The service engine soon light on your 2001 Cadillac DTS indicates the engine control computer has detected a malfunction. The Service engine soon light serves the same function as a "check engine" light. Please use the following link to find out more information - http://repairpal.com/check-engine-light.
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