Engine Coolant Temperature Sensor: Inspection

2022 Subaru Impreza Base, 4D Sedan, Automatic CVT TransSECTION Inspection
WARNING: This page is about a different car, the 2022 Subaru Crosstrek. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check that the engine coolant temperature sensor has no deformation, cracks or other damages.
  2. Immerse the engine coolant temperature sensor and a thermometer in water.
    CAUTION:

    Take care not to allow water to get into the engine coolant temperature sensor connector. Completely remove any water inside. 

    G13934206Courtesy of SUBARU OF AMERICA, INC.
  3. Raise water temperature gradually, measure the resistance between the engine coolant temperature sensor terminals when the temperature is 20°C (68°F) and 80°C (176°F).
NOTE:

Agitate the water for even temperature distribution. 

G11252861Courtesy of SUBARU OF AMERICA, INC.
Water temperature Terminal No. Standard
20°C (68°F) 1 and 2 2.45±0.2 kΩ
80°C (176°F) 0.318±0.013 kΩ
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

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.