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Home >> Chevrolet >> 2020 >> Camaro SS, 2D Coupe, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Controls And Fuel - 3.6L (LGX) - Diagnostic Information And Procedures (P0010 - P0455)) >> Diagnostic Information and Procedures >> DTC P0068 or P1101 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Ignition - On / Vehicle - In Service Mode
  2. Verify DTC P0641, P0651, P0697, P06A3, P06D2 is not set.
    • Go to next step: If none of the DTCs are set 
  3. Verify the scan tool parameter: Throttle Body Idle Air Flow Compensation = Less than 90%
    • Go to next step: If less than 90% 
  4. Perform the scan tool control function: Throttle Sweep - On

    Verify the scan tool parameter: Throttle Position Sensors 1 and 2 = Agree

    • Go to next step: If the specified state 
  5. Determine the current vehicle testing altitude.
  6. Verify the scan tool parameter: MAP Sensor = Altitude Versus Barometric Pressure - The value should be within the range listed in the table.
    • Go to next step: If in the specified range 
  7. Verify the following conditions do not exist:
    • B75C Multifunction Intake Air Sensor - Contamination of the measuring element / Water intrusion/Cracked/Loose Clamps / Visible Damage
    • Q38 Throttle Body - Loose Clamps / Visible Damage
    • Air Cleaner Element - Dirty / Restricted
    • Catalytic Converter - Blocked / Restricted / Visible Damage
    • Intake Air Duct & Intake Manifold - Cracked / Loose Clamps / Restricted / Visible Damage
    • O-Ring @ B17 Barometric Pressure Sensor / Leaking / Missing / Visible Damage
    • O-Ring @ B74 Manifold Absolute Pressure Sensor / Leaking / Missing / Visible Damage
    • Positive Crankcase Ventilation System - Leaking / Incorrect connection / Restricted
    • Vacuum Hoses - Kinked / Leaking / Incorrect connection / Restricted
    • Vacuum leak @ Engine / Intake Manifold / Q38 Throttle Body
    • If a condition exists 

      Repair or replace the components as necessary.

    • Go to next step: If no condition exists 
  8. Engine - Idling
  9. Verify the scan tool parameter: MAP Sensor = 26 to 52 kPa (3. 8 to 7. 5 PSI) and changes - The value should change with accelerator pedal input.
    • Go to next step: If between 26 and 52 kPa (3. 8 and 7. 5 PSI) and changes 
    10. NOTE:

    While reviewing the data frame by frame, the parameter should change smoothly and gradually as the engine speed was increased and decreased.

  10. Perform the following steps:
    1. Engine - Idling - At normal operating temperature
    2. Increase the engine speed slowly to 3k RPM and then back to idle.
    3. Perform the scan tool function: Review Stored Data
    4. Observe the scan tool parameter frame by frame with a scan tool: MAF Sensor

      Verify the parameter changes smoothly and gradually in the recorded data as the engine speed was increased and decreased.

    • If the value does not change smoothly and gradually 

      Refer to: DTC P0101-P0103 

    • Go to next step: If the value changes smoothly and gradually 
  11. 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 that no DTCs are set.

    • Go to next step: If no DTC is set 
  12. All OK.
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