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Home >> Jeep >> 2024 >> Compass Trailhawk >> Repair and Diagnosis >> Engine Performance >> System >> 2.0L - DTCS P0133 To P018C >> DTC Troubleshooting >> P018B-Fuel Pressure Sensor Circuit Performance >> Diagnostic Test
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Diagnostic Test

  1. READ AND RECORD DTCS AND ENVIRONMENTAL DATA - ERASE DTCS AND CHECK FOR THE DTC TO RETURN 
    1. With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
    2. For future reference, with the scan tool, run and save a vehicle Scan Report and all related recorded data.
    3. With the scan tool, erase all DTCs.
    4. Turn the ignition off for a minimum of 10.0 seconds.
    5. Turn the ignition on.
    6. Using the When Monitored and Set Conditions above and recorded data, operate the vehicle in the conditions that set the DTC.
    7. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      • Go To  2

      No 

  2. CHECK FOR OTHER DTCS 
    1. Refer to the recorded DTCs.

      Are there any 5-Volt Reference or Fuel Pressure Sensor circuit DTCs active or pending?

      Yes 

      No 

      • Go To  3
  3. CHECK THE FUEL PRESSURE SENSOR CONNECTOR AND TERMINALS 
    1. Turn the ignition off.
    2. Check the Fuel Pressure Sensor harness connector for proper connection at the Fuel Pressure Sensor.
    3. Verify that the connector is completely plugged in and properly locked prior to disconnecting.
    4. Disconnect the Fuel Pressure Sensor harness connector and check for any pushed out, damaged or spread terminals.

      Were any issues found with the connector or terminals?

      Yes 

      • Repair the damaged terminal or properly connect and lock the Fuel Pressure Sensor harness connector and retest for DTCs.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  4
  4. VISUALLY INSPECT THE FUEL SYSTEM FOR LEAKS OR RESTRICTIONS 
    1. Visually inspect the fuel system for leaks or restrictions.

      Were any fuel system issues found?

      Yes 

      No 

      • Go To  5
  5. CHECK THE FUEL DELIVERY SYSTEM FOR PROPER OPERATION 
    1. Perform the CHECKING THE FUEL DELIVERY SYSTEM (HARD START) test procedure. Refer to CHECKING THE FUEL DELIVERY SYSTEM (HARD START) .

      Is the Fuel Pump Assembly operating to specifications?

      Yes 

      • Replace the Fuel Pressure Sensor in accordance with the Service Information.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Replace the Fuel Pump Assembly in accordance with the Service Information.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .