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HOMESERVICE MANUALSCHEVROLET2001CAVALIER LS, 2.4 TREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 8 (ENGINE CONTROL SYSTEM SELF-DIAGNOSTICS - 5.7L)DIAGNOSTIC TESTSDTC P1258: ENGINE COOLANT OVERTEMPERATURE - PROTECTION MODE ACTIVECIRCUIT DESCRIPTION
2001 Chevrolet Cavalier LS, 2.4 T

Circuit Description

2001 Chevrolet Cavalier LS, 2.4 TSECTION 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.

RENDER: 1.0x

NO RELATED

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.