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Home >> Pontiac >> 2000 >> Firebird Base, 2D Convertible, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (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 variant/trim than selected.

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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