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Home >> GMC >> 2020 >> Terrain Denali, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine Controls And Fuel - 1.5L (LYX) - Diagnostic Information And Procedures (1 Of 2)) >> Diagnostic Information and Procedures >> DTC P0191 or P0192 >> 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 there are no DTCs set related to the following component/system : 5V Reference
    • Go to next step : If none of the DTCs are set 
  3. Verify there are no DTCs set related to the following component/system : B310 Fuel Pressure/Temperature Sensor
    • If other DTCs are set - With DTC P0191 set. 

      Refer to Circuit/System Testing.

    • Go to next step : If only DTC P0191 is set & No other DTCs related to the concerned component are set. 

      Go to next step : Replace the component : B310 Fuel Pressure/Temperature Sensor

    • Go to next step : If none of the DTCs are set 
  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.
  5. Verify that no DTCs are set.
    • If any of the DTCs are set 

      Refer to Circuit/System Testing.

    • Go to next step : If none of the DTCs are set 
  6. All OK.
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