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Home >> Chevrolet >> 2018 >> Suburban 3500 HD LT >> Repair and Diagnosis >> External Pages >> Different car >> Section 2 (Engine Controls And Fuel - 5.3L (L83) Or 6.2L (L86) - DTC P0010 To DTC P0442) >> Diagnostic Information And Procedures >> DTC P0324, P0325, P0326, P0327, P0328, P0330, P0331, P0332, P0333, P06B6 Or P06B7: Knock Sensor >> Circuit/System Verification

Circuit/System Verification

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban, and 2018 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.
  1. Engine - Running
  2. Verify DTC P0325, P0327, P0328, P0330, P0332, P0333, P06B6, P06B7 is not set.
    • If only DTC P0325, P0327, P0328, P0330, P0332, P0333, P06B6, P06B7 is set 

      Refer to Circuit/System Testing below

    • If only DTC P06B6, P06B7 is set 

      Replace the component : K20 Engine Control Module

    • Go to next step : If none of the DTCs are set 
  3. Verify the scan tool parameter : Cylinder 1-8 Knock Detected = No

    Perform the action while monitoring the parameter :

    • Wiggle the harness and connector : B68 Knock Sensor
    • Wiggle the harness and connector : K20 Engine Control Module
    • If not the specified state 

      Repair as necessary - Wiring / Terminal(s) / Electrical Connector(s)

    • Go to next step : If the specified state 
  4. Verify DTC P0324, P0326, P0331 is not set.
    • If the DTC is set 
    1. Verify a condition does not exist with the component : B68 Knock Sensor
      • Incorrect installation - Refer to Fastener Specifications
      • Interference with other components - Bracket/Engine Wiring Harness/Hoses / Lines
      • Visible Damage
      • If a condition exists - Repair or replace as necessary
      • If no condition exists
    2. Verify the condition did not cause the DTC to set :
      • Accessory drive bracket - Loose/Visible Damage
      • Drive Belt & Belt Driven Device - Loose/Visible Damage
      • Engine - Mechanical Condition - Refer to Symptoms - Engine Mechanical
      • Fuel - Contaminated/Poor Quality
      • If a condition exists - Repair or replace as necessary
      • If all conditions test normal - Test or replace the component : B68 Knock Sensor
    • Go to next step : If none of the DTCs are set 
  5. 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 

      Refer to Circuit/System Testing below

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