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Home >> Chevrolet >> 2022 >> Tahoe PPV, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Engine Controls And Fuel - 3.0L (Lm2) Diesel - Diagnostic Information And Procedures (4 Of 5)) >> Diagnostic Information and Procedures >> DTC P21CB >> Circuit/System Verification

Circuit/System Verification

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  1. Verify DTC P10F4, P20FF is not set.
    • Go to next step: If none of the DTCs are set 
  2. Verify DTC P21CB is not set.
    • If the DTC is set 

      Refer to: Circuit/System Testing

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