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Home >> Buick >> 2019 >> Regal TourX Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 138 (Engine Controls And Fuel - 3.6L (LGX) - Diagnostic Information And Procedures (P0010-P0446)) >> Diagnostic Information and Procedures >> DTC P0112, P0113, or P0114 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2020 Buick Regal and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

If you were sent here from DTC P0111 - Refer to: Circuit/System Testing.

  1. Ignition - On / Vehicle - In Service Mode
  2. Verify the scan tool parameter: IAT Sensor 1 = -39 to 149°C (-36 to 300°F)
    • If not between -39 and 149°C (-36 and 300°F) 

      Refer to: Circuit/System Testing

    • Go to next step: If between -39 and 149°C (-36 and 300°F) 
  3. Verify the scan tool parameter: IAT Sensor 1 = The value should not spike or drop out.

    Perform the action while monitoring the parameter:

    • Wiggle the harness and connector: B75C Multifunction Intake Air Sensor
    • Wiggle the harness and connector: X2 @ K20 Engine Control Module
    • If the value spikes or drops out 

      Repair as necessary - Wiring / Terminal(s) / Electrical Connector(s)

    • Go to next step: If the value does not spike or drop out 
  4. 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

    • Go to next step: If the DTC is not set 
  5. All OK.
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