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Home >> Dodge and Ram >> 2020 >> Durango R/T, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 18 (3.6L - DTCS P0501 To P0630) >> DTC Troubleshooting >> P0521-Engine Oil Pressure Sensor Performance >> Diagnostic Test

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.
      • LOW ENGINE OIL
      • ENGINE OIL PRESSURE BELOW SPECIFICATION
      • ENGINE MECHANICAL TOLERANCES OUT OF SPECIFICATION
      • 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 THE EOP SENSOR CONNECTOR AND TERMINALS 
    1. Turn the ignition off.
    2. Check the EOP Sensor harness connector for proper connection at the EOP Sensor.
    3. Verify that the connector is completely plugged in and properly locked prior to disconnecting.
    4. Disconnect the EOP 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 EOP Sensor harness connector and retest for DTCs.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  4
  4. CHECK FOR HIGH RESISTANCE IN THE EOP SENSOR (G6/G60) PRESSURE SIGNAL CIRCUIT 
    1. 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.

    2. Connect the (special tool #10436, Adapter, GPEC Diagnostic).
    3. Measure the resistance of the EOP Sensor (G6/G60) Pressure Signal 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 EOP Sensor (G6/G60) Pressure Signal circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  5. CHECK FOR HIGH RESISTANCE IN THE (F855/K855) 5-VOLT SUPPLY CIRCUIT 
    1. Measure the resistance of the (F855/K855) 5-Volt Supply 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 (F855/K855) 5-Volt Supply circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  6. 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  7

      No 

      • Repair the high resistance in the (K900) Sensor Ground circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  7. REPLACE THE ENGINE OIL PRESSURE SENSOR AND RETEST FOR DTC 
    1. Replace the Engine Oil Pressure (EOP) Sensor in accordance with the Service Information. Refer to SENSOR, OIL PRESSURE
    2. Connect the EOP Sensor and PCM harness connectors.
    3. Turn the ignition on.
    4. With the scan tool, erase DTCs.
    5. Using the recorded Freeze Frame and the When Monitored conditions, operate the vehicle in the conditions that set the DTC.
    6. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      • Go To  8

      No 

      • Replacing the Engine Oil Pressure (EOP) Sensor repaired the fault.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  8. CHECK RELATED PCM AND COMPONENT CONNECTIONS 
    1. Perform any Service Bulletins that apply.
    2. Disconnect all PCM harness connectors.
    3. Disconnect all related in-line harness connections (if equipped).
    4. Disconnect the related component harness connectors.
    5. 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.

    6. Reconnect all PCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
    7. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
    8. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
    9. With the scan tool, erase DTCs.
    10. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
    11. 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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