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Home >> Chevrolet >> 2021 >> Blazer RS, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Engine Controls And Fuel - 2.5L (LCV) - Diagnostic Information And Procedures (1 Of 2)) >> Diagnostic Information and Procedures >> DTC P034A or P034B >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition - On / Vehicle - In Service Mode
  2. Verify DTC P0335, P0336, P0651 is not set.
    • Go to next step: If none of the DTCs are set 
  3. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

    Verify the DTC does not set.

    • If the DTC sets 

      Test or replace the component: B26 Crankshaft Position Sensor

    • Go to next step: If the DTC is not set 
  4. All OK.
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