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Pinpoint Test Ad: The Low Engine Oil Pressure Warning Indicator Is Never Or Always On (1.5L)

  1. Instrument Cluster for schematic and connector information.

    Normal Operation and Fault Conditions 

    See Low Engine Oil Pressure Warning. REFER to: Instrument Panel Cluster (IPC) - System Operation and Component Description .

    If the engine rpm data or engine oil pressure warning indicator request message is missing less than 5 seconds, the IPC defaults the low engine oil pressure warning indicator or RTT warning indicator to the last state (on or off), based upon the last message received.

    If the engine rpm data or engine oil pressure warning indicator request message is missing for 5 seconds or longer, the IPC defaults the low engine oil pressure warning indicator or RTT warning indicator on.

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    PCM P0522:00 Engine Oil Pressure Sensor/Switch "A" Circuit Low: No Sub Type Information Sets in the PCM when the PCM detects a short to ground on the hardwired input from the engine oil pressure sensor.
    PCM P0523:00 Engine Oil Pressure Sensor/Switch "A" Circuit High: No Sub Type Information Sets in the PCM when the PCM detects an open on the hardwired input from the engine oil pressure sensor.
    PCM P055F:00 Engine Oil Pressure Out of Range: No Sub Type Information Sets in the PCM when the PCM detects the engine oil pressure is out of range.

    Possible Sources 

    • Wiring, terminals or connectors
    • Instantaneous invalid sensor signal
    • Low engine oil pressure
    • Engine oil pressure sensor
    • GWM
    • PCM
    • IPC

  2. AD1 CHECK THE ENGINE OIL PRESSURE SENSOR STATUS

    NOTE: Make sure the engine temperature is warm or hot when performing this step.

    • Ignition ON.

    • Using a diagnostic scan tool, view PCM Parameter Identifications (PIDs).

    • Access the PCM and monitor the EOP_URPID

    Is an engine oil pressure circuit fault present? 

    Yes  GO to  AD9
    No  GO to  AD2

  3. AD2 PERFORM THE PCM (POWERTRAIN CONTROL MODULE) SELF-TEST

    • Using a diagnostic scan tool, perform the PCM self-test.

    • Check for recorded Diagnostic Trouble Codes (DTCs).

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  For DTC P0522 and P0523, GO to  AD9
    For all other Diagnostic Trouble Codes (DTCs), REFER to the Master DTC Chart.
    No  GO to  AD3

  4. AD3 IDENTIFY THE IPC (INSTRUMENT PANEL CLUSTER) LEVEL

    Is the vehicle equipped with a base IPC? 

    Yes  GO to  AD5
    No  GO to  AD4

  5. AD4 CHECK THE MESSAGE CENTER OPERATION

    • Ignition ON.

    • Close all doors, liftgate and hood.

    • Clear all message center warnings by pressing the OK button for each warning present.

    • Monitor the door ajar RTT warning indicator.

    • Open the driver door.

    • Clear the message center popup warning.

    • Monitor the door ajar RTT warning indicator.

    Is the door ajar RTT warning indicator off with the door closed, and on with the door open? 

    Yes  GO to  AD6
    No  GO to Pinpoint Test A 

  6. AD5 PERFORM THE IPC (INSTRUMENT PANEL CLUSTER) INDICATOR LAMP CONTROL ACTIVE COMMAND USING A DIAGNOSTIC SCAN TOOL

    • Ignition ON.

    • Using a diagnostic scan tool, view the IPC Parameter Identifications (PIDs).

    • Access the IPC and control the OIL_P_LOWPID

    • Command the low engine oil pressure warning indicator on then off while observing the indicator.

    Does the low engine oil pressure warning indicator turn on when commanded on and turn off when commanded off? 

    Yes  GO to  AD6
    No  GO to  AD17

  7. AD6 CHECK THE TACHOMETER OPERATION

    • Start the engine.

    • Verify the tachometer operates.

    Does the tachometer operate? 

    Yes  GO to  AD7
    No  For high level IPC, GO to Pinpoint Test B  For the base or mid-level, IPC, GO to Pinpoint Test I 

  8. AD7 PERFORM THE IPC (INSTRUMENT PANEL CLUSTER) SELF-TEST

    • Using a diagnostic scan tool, perform the IPC self-test.

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  REFER to the IPC DTC Chart.
    No  GO to  AD8

  9. AD8 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)

    • Using a diagnostic scan tool, check the GWM Continuous Memory Diagnostic Trouble Codes (CM DTCs).

    Are any Diagnostic Trouble Codes (DTCs) recorded? 

    Yes  REFER to: Communications Network
    No  GO to  AD9

  10. AD9 CHECK FOR VOLTAGE AT THE ENGINE OIL PRESSURE SENSOR

    • Ignition OFF.

    • Disconnect Engine Oil Pressure Sensor C1642.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      Refer to C1642-3
      GFD590531Courtesy of FORD MOTOR COMPANY
      		 Refer to C1642-2

    Is the voltage approximately 5 volts? 

    Yes  GO to  AD10
    No  GO to  AD13

  11. AD10 CHECK THE ENGINE OIL PRESSURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE

    • Ignition OFF.

    • Disconnect PCM C175E.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      Refer to C175E-21
      GFD590531Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit.
    No  GO to  AD11

  12. AD11 CHECK THE ENGINE OIL PRESSURE SENSOR SIGNAL CIRCUIT FOR AN OPEN

    • Ignition OFF.

    • Measure:

      1.5L 

      Positive Lead Measurement / Action Negative Lead
      Refer to C175E-21
      GFD590530Courtesy of FORD MOTOR COMPANY
      		 Refer to C1642-1

    Is the resistance less than 3 ohms? 

    Yes  GO to  AD12
    No  REPAIR the circuit.

  13. AD12 CHECK THE ENGINE OIL PRESSURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      Refer to C1642-1
      GFD590530Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  INSTALL a new engine oil pressure sensor. REFER to: Engine Oil Pressure (EOP) Sensor
    CLEAR the Diagnostic Trouble Codes (DTCs). TEST the system for normal operation. If the engine oil pressure indicator or RTT indicator is still always on, REFER to: appropriate Electronic Engine Controls article.
    No  REPAIR the circuit.

  14. AD13 CHECK THE ENGINE OIL PRESSURE SENSOR VREF CIRCUIT FOR A SHORT TO VOLTAGE

    • Ignition OFF.

    • Disconnect PCM C175E.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      Refer to C1642-3
      GFD590531Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit.
    No  GO to  AD14

  15. AD14 CHECK THE ENGINE OIL PRESSURE SENSOR VREF CIRCUIT FOR AN OPEN

    • Ignition OFF.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      Refer to C1642-3
      GFD590530Courtesy of FORD MOTOR COMPANY
      		 Refer to C175E-25

    Is the resistance less than 3 ohms? 

    Yes  GO to  AD15
    No  REPAIR the circuit.

  16. AD15 CHECK THE ENGINE OIL PRESSURE SENSOR VREF CIRCUIT FOR A SHORT TO GROUND

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      Refer to C1642-3
      GFD590530Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  AD16
    No  REPAIR the circuit.

  17. AD16 CHECK THE ENGINE OIL PRESSURE SENSOR RETURN CIRCUIT FOR AN OPEN

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      Refer to C1642-2
      GFD590530Courtesy of FORD MOTOR COMPANY
      		 Refer to C175E-41

    Is the resistance less than 3 ohms? 

    Yes  INSTALL a new engine oil pressure sensor. REFER to: Engine Oil Pressure (EOP) Sensor
    CLEAR the Diagnostic Trouble Codes (DTCs). TEST the system for normal operation. If the low engine oil pressure warning indicator is still always on, REFER to: appropriate Electronic Engine Controls article.
    No  REPAIR the circuit.

  18. AD17 CHECK FOR CORRECT IPC (INSTRUMENT PANEL CLUSTER) OPERATION

    • Ignition OFF.

    • Disconnect and inspect the IPC connector.

    • Repair:

      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary

    • Reconnect the IPC connector. Make sure it seats and latches correctly.

    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new IPC. REFER to: Instrument Panel Cluster (IPC) 
    No  The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
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