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Q: obdII on 2003 Cadillac CTS

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
what does it mean when you get a fault code p0128 from your obdII
(1) Answer
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.