Check Engine Light With Code P0128 on Cadillac Catera

The thermostat may become stuck in the open position causing the engine to warm up too slowly, setting a P0128 trouble code and causing the Check Engine Light to illuminate.

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Average mileage: (–)
5 model years affected: 1997, 1998, 1999, 2000, more2001
6 people reported this problem
1 person shared problem details
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