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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 P0106: Manifold Absolute Pressure (MAP) Sensor Performance >> 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. Ignition ON.
  2. Verify that DTC P0641, P0651, P0697 or P06A3 is not set.
    • Go to next step : If none of the DTCs are set 
  3. If you were sent here from DTC P0068, P0101, P0121 or P1101; refer to Circuit/System Testing below.
  4. Verify the scan tool Throttle Body Idle Air Flow Compensation parameter is less than 90%
    • Go to next step : If less than 90% 
  5. Verify the scan tool Throttle Position Sensors 1 and 2 Agree/Disagree parameter displays Agree while performing the Throttle Sweep with a scan tool.
    • Go to next step : If Agree 
  6. Determine the current vehicle testing altitude.
  7. Verify the scan tool MAP Sensor parameter is within the range specified in the Altitude Versus Barometric Pressure table.
    • If the MAP Sensor parameter is not in range 

      Refer to Circuit/System Testing below.

    • Go to next step : If the MAP Sensor parameter is within range 
  8. Engine idling.
  9. Verify the scan tool MAP Sensor parameter is between 26 - 52 kPa (3.8 - 7.5 PSI) and changes with accelerator pedal input.
    • If not between 26 - 52 kPa (3.8 - 7.5 PSI) or does not change 

      Refer to Circuit/System Testing below.

    • Go to next step : If between 26 - 52 kPa (3.8 - 7.5 PSI) and changes 
  10. Verify the scan tool MAF Sensor parameter changes smoothly and gradually as the engine speed is increased and decreased while performing the actions listed below.
    1. Engine idling
    2. Perform the scan tool snapshot function.
    3. Increase the engine speed slowly to 3, 000 RPM and then back to idle.
    4. Exit from the scan tool snapshot and review the data.
    5. Observe the MAF Sensor parameter frame by frame with a scan tool.
    • If the MAF Sensor parameter does not change smoothly and gradually 

      Refer to DTC P0101  for further diagnosis.

    • Go to next step : If the MAF Sensor parameter 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.
  12. Verify the DTC does not set.
    • If the DTC sets 

      Refer to Circuit/System Testing below.

    • Go to next step : If the DTC does not set 
  13. All OK.
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