engine check light on 2003 Cadillac CTS

engine check light came on and when i put the obd II the code came back p0128

by in Rincon, GA on December 10, 2009
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1 answer
ANSWER by , December 10, 2009
This code means that your engine temperature is outside of the normal threshhold. When this happened to me, it was because my thermostat had failed. http://repairpal.com/check-engine-light