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2004 Cadillac DeVille with engine code P1258, how can it be reset?

Vehicle: 2004 Cadillac DeVille

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P1258 Engine coolant over temperature protection

Has the vehicle overheated, such as any coolant leaks , or non operating cooling fans, if not this would be with the coolant temperature,
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P1258 CADILLAC - Engine Coolant Overtemperature Protection Mode Active

Read more: https://www.autocodes.com/p1258_cadillac.html

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