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Home › Kia › 2004 › Amanti › Repair and Diagnosis › Engine Performance › System › Engine Control System Diagnosis (1 Of 2) › DTC P0125: Insufficient Coolant Temperature For Closed Loop Fuel Control › Inspection/Repair › Component Inspection › Check Engine Coolant Level and ECT Sensor

Check Engine Coolant Level and ECT Sensor

  1. Check engine coolant level.
  2. If needed, adjust coolant level, then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  3. If engine coolant level is proper, remove and check ECT sensor.
  4. Measure resistance between terminals 1 and 3 of the ECT sensor harness connector.
    1. Specification:
      TEMPERATURE AND RESISTANCE SPECIFICATIONS

      Temperature (°C (°F)) -30 (-22 °F) -20 (-4 °F) 0 (32 °F) 20 (68 °F) 40 (104 °F) 60 (140 °F) 80 (176 °F) 100 (212 °F) 110 (230 °F)
      Resistance (kΩ) 26.74 15.48 5.79 2.45 1.148 0.587 0.322 0.188 0.147
      Voltage (V) 4.39 4.17 3.48 2.56 1.68 1.04 0.63 0.39 0.31

      (error range is 2~3%.)

      Fig 1: Measuring Resistance Between Terminals 1 And 3 Of ECT Sensor Harness Connector
      G07330287
  5. Is the ECT sensor within specifications?

    YES

    1. Go to "CHECK THERMOSTAT " as below.

    NO

    1. Check ECT sensor for contamination, deterioration, or damage. Substitute with a known-good ECT sensor and check for proper operation. If the problem is corrected, replace ECT sensor and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
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