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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 174 (Engine Cooling System) >> Diagnostic Information and Procedures >> DTC P1258: Engine Coolant Overtemperature - Protection Mode Active >> Conditions for Setting the DTC

Conditions for Setting the DTC

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

The ECM detects that engine coolant temperature is warmer than 132°C (270°F) for 2 seconds or greater.

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