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Home >> Buick >> 2002 >> Century Custom >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics - 3.1L Engine >> Diagnostic Tests >> DTC P0128: Engine Coolant Thermostat >> Conditions For Setting DTC

Conditions For Setting DTC

The length of time for the engine coolant to reach a preset temperature of 170°F (80°C) has been exceeded.

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