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Home >> Cadillac >> 2021 >> CT5 Sport, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Engine Controls And Fuel - 3.0L (LGY) - Diagnostic Information And Procedures (1 Of 2)) >> Diagnostic Information and Procedures >> DTC P0182, P0183, P0187, P0188, P0191, P0192, P111F, P126E, P126F, P127C, P128A, P128B, U0625, U0670, U0671, or U101B >> 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 the scan tool parameter: Fuel Rail Pressure = 0.6 to 655 MPa (87 to 95025.7 PSI)
    • If not between 0.6 and 655 MPa (87 and 95025.7 PSI) 

      Refer to: Circuit/System Testing

    • Go to next step: If between 0.6 and 655 MPa (87 and 95025.7 PSI) 
  3. Verify the following parameters are within 2 MPa (290 PSI) of each other: Fuel Rail Pressure Sensor & Fuel Rail Pressure Sensor 2
    • If not within 2 MPa (290 PSI) of each other 

      Refer to: Circuit/System Testing

    • Go to next step: If within 2 MPa (290 PSI) of each other 
  4. Verify the scan tool parameter: Fuel Rail Pressure Sensor = The value should not spike or drop out.

    Perform the action while monitoring the parameter:

    • Wiggle the harness and connector: B310 Fuel Pressure and Temperature Sensor
    • Wiggle the harness and connector: 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 
  5. 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.
  6. 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 
  7. All OK.
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