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Home >> Chevrolet >> 2020 >> Trax LS, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 1.8L (2H0) >> Diagnostic Information and Procedures >> DTC P0128 >> Component Testing
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Component Testing

  1. Ignition/Vehicle - Off
  2. Disconnect the electrical connector: B34 Engine Coolant Temperature Sensor
  3. Test for 42 to 78, 834 ohms between the test points: Signal terminal 1/A & Low Reference terminal 2/B
    • If not between 42 and 78, 834 ohms 

      Replace the component: B34 Engine Coolant Temperature Sensor

    • Go to next step: If between 42 and 78, 834 ohms 
  4. Verify the value is within the range listed in the table: Temperature Versus Resistance - Engine Coolant Temperature Sensor 
    • If not in the specified range 

      Replace the component: B34 Engine Coolant Temperature Sensor

    • Go to next step: If in the specified range 
  5. Test for infinite resistance between the test points: Each terminal of the component & The component's housing
    • If less than infinite resistance 

      Replace the component: B34 Engine Coolant Temperature Sensor

    • Go to next step: If infinite resistance 
  6. All OK.
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