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Home >> Oldsmobile >> 2000 >> Intrigue GL >> Repair and Diagnosis >> External Pages >> Different car >> Section 8 (Engine Control System Self-Diagnostics - 5.7L) >> Diagnostic Tests >> DTC P1258: Engine Coolant OVERTEMPERATURE - Protection Mode Active >> Circuit Description
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Circuit Description

WARNING: This page is about a different car, the 2000 Pontiac Firebird, 2000 Chevrolet Corvette, and 2000 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.

In order to reduce engine temperature, PCM has ability to disable a number or fuel injectors during and engine overtemperature condition. Engine is considered overtemperature when Engine Coolant Temperature (ECT) sensor reaches a predetermined temperature. DTC sets when PCM senses ECT sensor is in overtemperature condition, and PCM enters protection mode.

DTC will set when following conditions are present: DTC P0117, P0118 or P0125 not set, engine is running, ECT greater than 270°F (132°C) and these conditions present for greater than 10 seconds.

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