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Home >> Chevrolet >> 2017 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Automatic Transmission - 9T50 (M3E) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P2820 or P2821: Transmission Control Solenoid Valve 9 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Verify the condition does not exist: Incorrect fluid level or condition - Refer to Transmission Fluid Level and Condition Check 
    • If a condition exists 

      Repair or replace as necessary.

    • If no condition exists, go to next step 
  2. Ignition - On / Vehicle - In Service Mode
  3. Clear DTCs
  4. Road test the vehicle. - Refer to Road Test 
  5. Verify DTC P0716, P0717, P0721, P0722, P0723, P07BF, P077C, P077D, P07C0, P176B, P176C, P176D, P17D3, P2731, P2820, P2821 is not set.
    • If DTC P0716, P0717, P0721, P0722, P0723, P07BF, P077C, P077D, P07C0, P176B, P176C, P176D, P17D3 is set 

      Refer to Diagnostic Trouble Code (DTC) List - Vehicle

    • If DTC P2820 or P2821 is set 

      Refer to Diagnostic Fault Information

    • If none of the DTCs are set, go to next step 
  6. 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 DTC P0716, P0717, P0721, P0722, P0723, P07BF, P077C, P077D, P07C0, P176B, P176C, P176D, P17D3, P2731, P2820, P2821 is not set.

    • If DTC P0716, P0717, P0721, P0722, P0723, P07BF, P077C, P077D, P07C0, P176B, P176C, P176D, P17D3 is set 

      Refer to Diagnostic Trouble Code (DTC) List - Vehicle

    • If DTC P2820 or P2821 is set 

      Refer to Diagnostic Fault Information

    • If none of the DTCs are set, go to next step 
  7. All OK.