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Home >> Chevrolet >> 2018 >> Suburban 3500 HD LT >> Repair and Diagnosis >> External Pages >> Different car >> Section 5 (Engine Mechanical - 5.3L (L83) Or 6.2L (L86) - Diagnostic Information And Procedures) >> Diagnostic Information And Procedures >> DTC P06DA, P06DB, P06DC, P06DD: Engine Oil Pressure Control Solenoid Valve >> Circuit/System Verification

Circuit/System Verification

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NOTE: The engine oil level and condition is critical to the correct operation of the system.
  1. Ignition - On / Vehicle - In Service Mode
  2. Verify there are no DTCs set related to the following system/component:
    • B35 Engine Oil Level Switch
    • B37B Engine Oil Pressure Sensor
    • B36 Engine Oil Temperature Sensor
    • Go to next step: If no other DTCs are set 
  3. Verify the condition does not exist:Engine Oil - Contaminated/Dirty/Fill Level = Low
    • If a condition exists 

      Repair as necessary

    • Go to next step: If no condition exists 
  4. Perform the scan tool control function:Engine Oil Pressure Control Solenoid Valve - On and Off

    Verify the scan tool parameter:

    • Engine Oil Pressure Control Solenoid Valve Control Circuit Low Voltage Test Status = OK or Not Run
    • Engine Oil Pressure Control Solenoid Valve Control Circuit Open Test Status = OK or Not Run
    • Engine Oil Pressure Control Solenoid Valve Control Circuit High Voltage Test Status = OK or Not Run
    • If not the specified state 

      Refer to Circuit/System Testing

    • Go to next step: If the specified state 
  5. Engine - Running
  6. Perform the following steps:
    1. Increase the engine speed slowly to 1, 800 RPM.
    2. Perform the scan tool control function:Engine Oil Pressure Control Solenoid Valve - On
      NOTE: Using the scan tool line graph function may make it easier to identify if the value changes.

      Verify the scan tool parameter: Engine Oil Pressure = Change is greater than 30 kPa (4 PSI)

      • If the change is 30 kPa (4 PSI) or less - Replace the component:Q44 Engine Oil Pressure Control Solenoid Valve
      • If the change is greater than 30 kPa (4 PSI)
  7. 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 
  8. All OK.
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