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Home >> Chevrolet >> 2018 >> Suburban 3500 HD LT >> Repair and Diagnosis >> External Pages >> Different car >> Section 9 (Engine Controls And Fuel - 5.3L (L83) Or 6.2L (L86) - DTC P0443 To DTC P3452 And Diagnostic Information And Procedures) >> Diagnostic Information And Procedures >> DTC P0601, P0602, P0603, P0604, P0606, P062B, P062F, P0630, P16F3 Or P262B: Control Module Memory Performance >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition ON, clear the DTC information with a scan tool.
  2. Verify no other DTCs are set.
    NOTE: DTC P0601, P0602, P0603, P0604, P0606, P062B, P062F, P0630, P16F3 or P262B could be set as a default action taken from another DTC.
    • Go to next step: If no other DTCs are set 
  3. Observe the DTC information with a scan tool. Verify DTC P0602 or P0630 is not set.
    • If any of the DTCs are set 
    1. Program the K20 Engine Control Module. Refer to Control Module References .
    2. Verify DTC P0602 or P0630 is not set.
      • If any of the DTCs are set, replace the K20 Engine Control Module.
      • If none of the DTCs are set
    3. All OK.
    • Go to next step: If none of the DTCs are set 
  4. Verify DTC P0601, P0603, P0604, P0606, P062B, P062F, P16F3 or P262B is not set.
    • If any of the DTCs are set 

      Replace the K20 Engine Control Module.

    • Go to next step: If none of the DTCs are set 
  5. All OK.
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