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 , 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.