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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Engine Controls And Fuel - 2.4L - DTC P0628 To DTC P2635 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P2227-P2230: Barometric Pressure (BARO) Sensor >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition On.
  2. Verify DTC P0106, P0107, P0108, P0641, or P0697 is not set.
    • If none of the DTCs are set 
  3. Verify the scan tool MAP Sensor parameter is within the range specified in the Altitude Versus Barometric Pressure table.
    • If not within the specified range 

      Refer to DTC P0106 .

    • If within the specified range 
  4. Verify the scan tool BARO parameter is within range specified in the Altitude Versus Barometric Pressure table.
    • If the BARO is not within the specified range 

      Refer to Circuit/System Testing.

    • If the BARO is within the specified range 
  5. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed in the Freeze Frame/Failure Records data.
  6. Verify the DTC does not set.
    • If the DTC sets 

      Refer to Circuit/System Testing.

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