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Home >> Chevrolet >> 2021 >> Trailblazer RS, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Automatic Transmission - VT40 (MRG) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0641 >> Component Testing

Component Testing

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  1. Ignition/Vehicle - Off
  2. Remove the component: Control Valve Body Cover
  3. Disconnect the electrical connector:
    • B12BA Transmission Fluid Pressure Sensor 1
    • B12BB Transmission Fluid Pressure Sensor 2
  4. Test for infinite resistance between the test points: Each terminal of the component & The component's housing
    • If less than infinite resistance 

      Replace the appropriate component: B12B Transmission Fluid Pressure Sensor

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