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HOMESERVICE MANUALSDODGE AND RAM2023DURANGO R/T PLUS, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 42 (6.2L - DTCS P0443 TO P058A)DTC TROUBLESHOOTINGP0521-ENGINE OIL PRESSURE SENSOR PERFORMANCEDIAGNOSTIC TEST
2023 Dodge and Ram Durango R/T Plus, AWD

Diagnostic Test

2023 Dodge and Ram Durango R/T Plus, AWDSECTION Diagnostic Test
WARNING: This page is about a different variant/trim than selected.
  1. CHECK FOR AN ACTIVE DTC 
    1. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
      WARNING:

      When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury.

    2. With the scan tool, read DTCs and record on the repair order.

      Is the DTC active or pending?

      Yes 

      • Go To  2

      No 

  2. CHECK THE ENGINE OIL/ENGINE MECHANICAL CONDITION 
    NOTE:

    Make sure that the engine oil is at the proper level. Also, review the customers oil change history to ensure that the oil is being changed at the correct intervals and that the proper oil viscosity is being used.

    1. The following items should be considered before determining the cause of this DTC. Failure to do so may lead to misdiagnosis.
      • ENGINE MECHANICAL TOLERANCES OUT OF SPECIFICATION
      • ENGINE OIL PRESSURE OUT OF SPECIFICATION
      • LOW ENGINE OIL
      • DETERIORATED OR DIRTY OIL
      • ENGINE OIL CONTAMINATED (i.e., coolant and/or fuel)
      NOTE:

      If any of the above conditions are found, repair as necessary.

      Were any of the above conditions present?

      Yes 

      No 

      • Go To  3
  3. CHECK FOR HIGH RESISTANCE IN THE (G6) OIL PRESSURE SIGNAL CIRCUIT 
    1. Turn the ignition off.
    2. Disconnect the EOP Sensor harness connector.
    3. Disconnect the PCM C2 harness connector.
      CAUTION:

      Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install the GPEC Diagnostic Adaptor to perform the diagnosis.

    4. Connect the (special tool #10436, Adapter, GPEC Diagnostic).
    5. Measure the resistance of the (G6) Oil Pressure Signal circuit from the EOP Sensor harness connector to the GPEC Adaptor.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  4

      No 

      • Repair the high resistance in the (G6) Oil Pressure Signal circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  4. CHECK FOR HIGH RESISTANCE IN THE (F855) 5-VOLT SUPPLY CIRCUIT 
    1. Measure the resistance of the (F855) 5-Volt Supply circuit from the EOP Sensor harness connector to the GPEC Adaptor.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  5

      No 

      • Repair the high resistance in the (F855) 5-Volt Supply circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  5. CHECK FOR HIGH RESISTANCE IN THE (K900) SENSOR GROUND CIRCUIT 
    1. Measure the resistance of the (K900) Sensor Ground circuit from the EOP Sensor harness connector to the GPEC Adaptor.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  6

      No 

      • Repair the high resistance in the (K900) Sensor Ground circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  6. CHECK THE ABILITY OF THE PCM TO READ THE EOP SENSOR SIGNAL 
    1. Connect the PCM C2 harness connector.
    2. Turn the ignition on.
    3. With the scan tool, monitor the EOP Sensor voltage.
    4. Connect a jumper between the (K900) Sensor Ground circuit and the (G6) Oil Pressure Signal circuit.
      NOTE:

      Engine Oil Pressure voltage should change from approximately 4.9 volts to less than 0.1 volt.

      Is the voltage reading as described above with the EOP Sensor disconnected and with the jumper in place?

      Yes 

      • Verify that there is good pin to terminal contact in the Sensor and Powertrain Control Module connectors. Remove the Engine Oil Pressure Sensor and ensure the oil passage/port is free from any blockage. If no problem is found, replace the Engine Oil Pressure Sensor. Refer to SENSOR, OIL PRESSURE, REMOVAL .
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  7
        NOTE:

        Remove the jumper before continuing.

  7. CHECK RELATED HARNESS CONNECTIONS 
    1. Disconnect all PCM harness connectors.
    2. Disconnect all related in-line harness connections (if equipped).
    3. Disconnect the related component harness connectors.
    4. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
      • Proper connector installation.
      • Damaged connector locks.
      • Corrosion.
      • Other signs of water intrusion.
      • Weather seal damage (if equipped).
      • Bent terminals.
      • Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
      • Terminals that have been pushed back into the connector cavity.
      • Check for spread terminals and verify proper terminal tension.

      Repair any conditions that are found.

    5. Connect all PCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
    6. Connect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
    7. Connect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
    8. With the scan tool, erase DTCs.
    9. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
    10. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      No 

      • The wiring or poor connection problem has been repaired.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.