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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls And Fuel - 2.0L (LTG) - DTC P0010 To DTC P0333 >> Diagnostic Information and Procedures >> DTC P0106: Manifold Absolute Pressure (MAP) Sensor >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON.
  2. Verify that DTC P0641, P0651, P0697, or P06A3 is not set.
    • If none of the DTCs are set 
  3. If you were sent here from DTC P0068, P0101, P0121, P0236, or P1101 refer to Circuit/System Testing.
  4. Verify the scan tool Throttle Body Idle Airflow Compensation parameter is less than 90%.
    • If less than 90% 
  5. Verify the scan tool Throttle Body Sensors 1 and 2 Agree/Disagree parameter displays Agree while performing the Throttle Sweep Test with a scan tool.
    • If Agree 
  6. Determine the current vehicle testing altitude.
  7. Verify the scan tool MAP Sensor pressure parameter is within the range specified in the Altitude Versus Barometric Pressure (With LFX) table.
    • If the MAP Sensor parameter is not in range 

      Refer to Circuit/System Testing.

    • If the MAP Sensor parameter is in range 
  8. Verify if the engine is equipped with a turbocharger.
    • If not equipped with a turbocharger 

      Refer to Step 12.

    • If equipped with a turbocharger 
  9. Verify the scan tool Boost Pressure Sensor parameter is within the range specified in the Altitude Versus Barometric Pressure (With LFX) table.
    • If the Boost Pressure Sensor parameter is not in range 

      Refer to DTC P0236  for further diagnosis.

    • If the Boost Pressure Sensor parameter is within range 
  10. Verify the scan tool Boost Pressure Sensor parameter decreases after starting the engine.
    • If the Boost Pressure Sensor parameter does not decrease 

      Refer to DTC P0236  for further diagnosis.

    • If the Boost Pressure Sensor parameter does decrease 
  11. Engine idling.
  12. Verify the scan tool MAP Sensor pressure 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.

    • If between 26-52 kPa (3.8-7.5 PSI) and changes 
  13. Verify the scan tool MAF Sensor g/s 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 3000 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.
    • The MAF Sensor parameter does not change smoothly and gradually 

      Refer to DTC P0101  for further diagnosis.

    • The MAF Sensor parameter changes smoothly and gradually 
  14. 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.
  15. Verify a DTC does not set.
    • If the DTC sets 

      Refer to Circuit/System Testing.

    • If the DTC does not set 
  16. All OK.
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