Pinpoint Test X : The Low Oil Pressure Warning Indicator Is Never Or Always On

WARNING: This page is about a different car, the 2018 Ford Focus. However, it is still accessible from the selected car via links, so may be relevant.

X1 CHECK THE LOW OIL PRESSURE WARNING INDICATOR USING THE DEALER TEST MODE

Ignition OFF.

Enter the Dealer Test Mode. Enter the Dealer Test Mode. REFER to: INSTRUMENT PANEL CLUSTER (IPC) - SYSTEM OPERATION AND COMPONENT DESCRIPTION

Scroll to LED test.

Monitor the low oil pressure warning indicator.

Does the low oil pressure warning indicator illuminate?

Yes	If the low oil pressure warning indicator is always on, GO to X2 If the low oil pressure warning indicator is never on, GO to X7

No	Refer to IPC GUIDED ROUTINE TESTING

X2 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE IPC (INSTRUMENT PANEL CLUSTER) SELF-TEST
- Using a diagnostic scan tool, perform a IPC self-test.
Are any Diagnostic Trouble Codes (DTCs) recorded?

Yes REFER to DTC Chart: IPC

No GO to X3

X3 CHECK FOR A STUCK CLOSED ENGINE OIL PRESSURE SWITCH
- Ignition OFF.
- Disconnect: Engine Oil Pressure Switch C1629 (1.0L GTDI)
- Disconnect: Engine Oil Pressure Switch C103 (2.0L GDI)
- Disconnect: Engine Oil Pressure Switch C1642 (2.0L GTDI)
- Disconnect: Engine Oil Pressure Switch C1629 (2.3L GTDI)
- Ignition ON.
- Observe the low oil pressure warning indicator.
Does the low oil pressure warning indicator turn off?

Yes GO to X6

No GO to X4

X4 CHECK THE OIL PRESSURE INPUT CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.

Disconnect: PCM C1915E (1.0L GTDI).

Disconnect: PCM C175E (2.0L GDI).

Disconnect: PCM C1381E (2.0L GTDI).

Disconnect: PCM C1926E (2.3L GDI).

Measure:

1.0L GTDI

Positive Lead	Measurement / Action	Negative Lead
C1915E-9	Courtesy of FORD MOTOR COMPANY	Ground

2.0L GDI

Positive Lead	Measurement / Action	Negative Lead
C175E-54	Courtesy of FORD MOTOR COMPANY	Ground

2.0L GTDI

Positive Lead	Measurement / Action	Negative Lead
C1381E-54	Courtesy of FORD MOTOR COMPANY	Ground

2.3L GTDI

Positive Lead	Measurement / Action	Negative Lead
C1926E-9	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to X5

No	REPAIR the circuit.

X5 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE PCM (POWERTRAIN CONTROL MODULE) KOEO (KEY ON, ENGINE OFF) SELF-TEST
- Using a diagnostic scan tool, perform a PCM KOEO self-test.
Are any Diagnostic Trouble Codes (DTCs) recorded?

Yes REFER to the ENGINE CONTROLS - INTRODUCTION (EXCEPT DIESEL & HYBRID)

No GO to X9

X6 CHECK THE OIL PRESSURE
- Test the engine for low oil pressure.
Was a low oil pressure concern detected?

Yes REPAIR the low oil pressure concern.

No INSTALL a new engine oil pressure switch.

X7 CHECK FOR A STUCK OPEN ENGINE OIL PRESSURE SWITCH

Ignition OFF.

Disconnect: Engine Oil Pressure Switch C1629 (1.0L GTDI)

Disconnect: Engine Oil Pressure Switch C103 (2.0L GDI)

Disconnect: Engine Oil Pressure Switch C1642 (2.0L GTDI)

Disconnect: Engine Oil Pressure Switch C1629 (2.3L GTDI)

Connect a fused jumper wire:

1.0L GTDI

Lead 1	Measurement / Action	Lead 2
C1629-1	Courtesy of FORD MOTOR COMPANY	Ground

2.0L GDI

Lead 1	Measurement / Action	Lead 2
C103-1	Courtesy of FORD MOTOR COMPANY	Ground

2.0L GTDI

Lead 1	Measurement / Action	Lead 2
C1642-1	Courtesy of FORD MOTOR COMPANY	Ground

2.3L GTDI

Lead 1	Measurement / Action	Lead 2
C1629-1	Courtesy of FORD MOTOR COMPANY	Ground

Ignition ON.

Observe the low oil pressure warning indicator.

Does the low oil pressure indicator turn on?

Yes	REMOVE the jumper wire. INSTALL a new engine oil pressure switch.

No	LEAVE the jumper wire connected. GO to X8

X8 CHECK THE ENGINE OIL PRESSURE INPUT CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect: PCM C1915E (1.0L GTDI).

Disconnect: PCM C175E (2.0L GDI).

Disconnect: PCM C1381E (2.0L GTDI).

Disconnect: PCM C1926E (2.3L GTDI).

Measure:

1.0L GTDI

Positive Lead	Measurement / Action	Negative Lead
C1915E-9	Courtesy of FORD MOTOR COMPANY	Ground

2.0L GDI

Positive Lead	Measurement / Action	Negative Lead
C175E-54	Courtesy of FORD MOTOR COMPANY	Ground

2.0L GTDI

Positive Lead	Measurement / Action	Negative Lead
C1381E-54	Courtesy of FORD MOTOR COMPANY	Ground

2.3L GTDI

Positive Lead	Measurement / Action	Negative Lead
C1926E-9	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance less than 3 ohms?

Yes	REMOVE the jumper wire. GO to X9

No	REMOVE the jumper wire. REPAIR the circuit.

X9 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION

Ignition OFF.

Disconnect and inspect all PCM and all related in-line connectors.

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 PCM and all related in-line connectors. Make sure they seat and latch correctly.

Operate the system and determine if the concern is still present

Is the concern still present?

Yes	CHECK On-Line Automotive Service Information System (OASIS) for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, Refer to PCM GUIDED ROUTINE TESTING

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.