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Check Engine Light With Code P0128 on Cadillac Catera

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: (–)
5 model years affected: 1997, 1998, 1999, 2000, more2001
6 people reported this problem
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