obdII on 2003 Cadillac CTS

what does it mean when you get a fault code p0128 from your obdII

by in Rincon, GA on December 10, 2009
1 answer
ANSWER by on 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.
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