DTC P0125 Engine Coolant Temperature (ECT) Insufficient for Closed Loop Fuel Control

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    Circuit Description

    To provide the best possible combination of driveability, fuel economy, and emission control, a closed loop air/fuel metering system is used. When the vehicle is first started, the PCM controls fuel delivery in open loop, ignoring the heat...

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    Service Manual Table of Contents

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    Document Title: DTC P0125 Engine Coolant Temperature (ECT) Insufficient for Closed Loop Fuel Control

    description

    fuel

    control

    closed

    loop

    system

    vehicle

    sensor

    hos

    signal

    engine

    coolant

    temperature

    start

    allow

    operation

    minutes

    action

    consecutive

    diagnostic

    test

    scan

    tool

    aids

    check

    cooling

    level

    refer

    radiator

    thermostat

    fans

    diagnosis

    wiring

    related

    poor

    procedures

    electrical

    displayed

    actual

    measured

    thermometer

    condition

    replace

    harness

    display

    value

    powertrain

    cool

    temp

    specified

    repair

    complete

    temperature sensor

    start engine

    diagnostic aids

    cooling system

    coolant level

    cooling radiator

    temperature measured

    actual coolant

    allow engine

    engine cool

    specified value

    action complete

    coolant temperature sensor

    cooling system coolant

    system coolant level

    check resistance wiring

    resistance wiring related

    sensor check poor

    check poor connections

    troubleshooting procedures electrical

    coolant temperature displayed

    coolant temperature measured

    temperature measured thermometer

    displayed engine coolant

    actual coolant temperature

    coolant temperature replace

    temperature sensor replacement

    powertrain board diagnostic

    allow engine cool

    engine cool completely

    with engine idling

    engine idling monitor

    cool temp display

    cool temp increase

    temp increase specified

    increase specified value