DTC P1405[AJ (3.0L Duratec)]

DTC P1405	Differential Pressure Feedback (D.P.F.) EGR sensor upstream hose off or plugged
DETECTION CONDITION	• The PCM monitors differential pressure across the EGR orifice when the EGR valve from open to close. If the PCM detects that the signal from D.P.F. EGR sensor indicates EGR flow is in the negative direction after the EGR valve commanded closed, the PCM determines D.P.F. EGR sensor upstream hose off or plugged.
POSSIBLE CAUSE	• Upstream hose is disconnected • Upstream hose is plugged (ice) • Plugged or damaged EGR tube

DTC P1405

Differential Pressure Feedback (D.P.F.) EGR sensor upstream hose off or plugged

DETECTION CONDITION

• The PCM monitors differential pressure across the EGR orifice when the EGR valve from open to close. If the PCM detects that the signal from D.P.F. EGR sensor indicates EGR flow is in the negative direction after the EGR valve commanded closed, the PCM determines D.P.F. EGR sensor upstream hose off or plugged.

POSSIBLE CAUSE

• Upstream hose is disconnected

• Upstream hose is plugged (ice)

• Plugged or damaged EGR tube

STEP	INSPECTION	ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
No	Record the FREEZE FRAME DATA on the repair order, then go to next step.
2	VERIFY SERVICE INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available?	Yes	Perform repair or diagnosis according to the available Service Information. If the vehicle is not repaired, go to next step.
No	Go to the next step.
3	INDETIFY TRIGGER DTC FOR FEEZE FRAME DATA • Is DTC P1405 on FREEZE FRAME DATA?	Yes	Go to the next step.
No	Go to FREEZE FRAME DATA DTC inspection. (See DTC TABLE[AJ (3.0L Duratec)].)
4	INSPECT UPSTREAM PRESSURE HOSE CONNECTIONS • Inspect upstream hose at D.P.F EGR sensor and orifice tube assembly for connect or poor connection.	Yes	Repair for hose connection properly, then go to the Step 8.
No	Go to the next step.
5	INSPECT UPSTREAM PRESSURE HOSE FOR PLUGGING Note • It is essential that the D.P.F. EGR pressure hose used is the connect repair part and not a substitute. • Visually inspect upstream pressure hose routing. Hose must not be pinched or have dips in it where water could settle or plugging, water or leaks. • Remove upstream pressure hose and carefully inspect for plugging, water or leaks • Is there a fault detected in the hose?	Yes	Repair or replace malfunctioning pressure hose, then go to Step 8.
No	Go to the next step.
6	CHECK ORIFICE TUBE ASSEMBLY AND D.P.F. EGR SENSOR • Inspect the upstream connection on the D.P.F. EGR sensor for plugging or damage at the sensor. • Inspect the exhaust manifold side pressure pickup tube at the orifice assembly for plugging or damage. • Is the D.P.F. EGR sensor or orifice tube assembly plugged or damaged?	Yes	Repair or replace D.P.F. EGR sensor or orifice tube assembly. Then go to Step 8.
No	Go to the next step.
7	CHECK D.P.F EGR SENSOR OUTPUT BY APPLYING VACUUM WITH HAND PUMP • Connect the M-MDS to DLC-2. • Disconnect pressure hoses at D.P.F. EGR sensor. • Connect a hand vacuum pump to the downstream connection at sensor (intake manifold side of sensor or smaller diameter pickup tube.) • Turn the ignition switch to the ON position. • Access DPFEGR PID and note PID value. • Apply 27—30 kPa {203—225 mmHg, 7.98—8.8 inHg} vacuum to the D.P.F EGR sensor and hold for a few seconds. • Quickly release vacuum. ― The DPFEGR PID voltage must be between 0.2 and 1.3 V with the ignition switch ON and no vacuum applied. ― The DPFEGR PID voltage must increase to greater than 4.0 V with the vacuum applied. ― The DPFEGR PID must drop to less than 1.5 V in less than 3 seconds when vacuum is released. • Does DPFEGR PID voltage indicate a fault in the D.P.F EGR sensor?	Yes	Replace D.P.F. EGR sensor, then go to the next step.
No	Unable to duplication or identify fault at this time. Go to the next step.
8	VERIFY TROUBLESHOOTING OF DTC P1405 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. • Drive the vehicles from a stop, accelerate to 72 km/h {45 MPH} at 1/2 to 3/4 throttle. Repeat 3 times. • Is the PENDING CODE same DTC present?	Yes	Replace PCM, then go to next step. (See PCM REMOVAL/INSTALLATION[AJ (3.0L Duratec)].)
No	Go to the next step.
9	VERIFY AFTER REPAIR PROCEDURE • Perform "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE[AJ (3.0L Duratec)].) • Is there any DTC present?	Yes	Go to applicable DTC inspection. (See DTC TABLE[AJ (3.0L Duratec)].)
No	Troubleshooting completed.

STEP

INSPECTION

ACTION

VERIFY FREEZE FRAME DATA HAS BEEN RECORDED

• Has FREEZE FRAME DATA been recorded?

Yes

Go to the next step.

Record the FREEZE FRAME DATA on the repair order, then go to next step.

VERIFY SERVICE INFORMATION AVAILABILITY

• Verify related Service Information availability.

• Is any related Service Information available?

Yes

Perform repair or diagnosis according to the available Service Information. If the vehicle is not repaired, go to next step.

Go to the next step.

INDETIFY TRIGGER DTC FOR FEEZE FRAME DATA

• Is DTC P1405 on FREEZE FRAME DATA?

Yes

Go to the next step.

Go to FREEZE FRAME DATA DTC inspection.

(See DTC TABLE[AJ (3.0L Duratec)].)

INSPECT UPSTREAM PRESSURE HOSE CONNECTIONS

• Inspect upstream hose at D.P.F EGR sensor and orifice tube assembly for connect or poor connection.

Yes

Repair for hose connection properly, then go to the Step 8.

Go to the next step.

INSPECT UPSTREAM PRESSURE HOSE FOR PLUGGING

Note

• It is essential that the D.P.F. EGR pressure hose used is the connect repair part and not a substitute.

• Visually inspect upstream pressure hose routing. Hose must not be pinched or have dips in it where water could settle or plugging, water or leaks.

• Remove upstream pressure hose and carefully inspect for plugging, water or leaks

• Is there a fault detected in the hose?

Yes

Repair or replace malfunctioning pressure hose, then go to Step 8.

Go to the next step.

CHECK ORIFICE TUBE ASSEMBLY AND D.P.F. EGR SENSOR

• Inspect the upstream connection on the D.P.F. EGR sensor for plugging or damage at the sensor.

• Inspect the exhaust manifold side pressure pickup tube at the orifice assembly for plugging or damage.

• Is the D.P.F. EGR sensor or orifice tube assembly plugged or damaged?

Yes

Repair or replace D.P.F. EGR sensor or orifice tube assembly. Then go to Step 8.

Go to the next step.

CHECK D.P.F EGR SENSOR OUTPUT BY APPLYING VACUUM WITH HAND PUMP

• Connect the M-MDS to DLC-2.

• Disconnect pressure hoses at D.P.F. EGR sensor.

• Connect a hand vacuum pump to the downstream connection at sensor (intake manifold side of sensor or smaller diameter pickup tube.)

• Turn the ignition switch to the ON position.

• Access DPFEGR PID and note PID value.

• Apply 27—30 kPa {203—225 mmHg, 7.98—8.8 inHg} vacuum to the D.P.F EGR sensor and hold for a few seconds.

• Quickly release vacuum.

― The DPFEGR PID voltage must be between 0.2 and 1.3 V with the ignition switch ON and no vacuum applied.

― The DPFEGR PID voltage must increase to greater than 4.0 V with the vacuum applied.

― The DPFEGR PID must drop to less than 1.5 V in less than 3 seconds when vacuum is released.

• Does DPFEGR PID voltage indicate a fault in the D.P.F EGR sensor?

Yes

Replace D.P.F. EGR sensor, then go to the next step.

Unable to duplication or identify fault at this time. Go to the next step.

VERIFY TROUBLESHOOTING OF DTC P1405 COMPLETED

• Make sure to reconnect all disconnected connectors.

• Clear the DTC from the PCM memory using the M-MDS.

• Drive the vehicles from a stop, accelerate to 72 km/h {45 MPH} at 1/2 to 3/4 throttle. Repeat 3 times.

• Is the PENDING CODE same DTC present?

Yes

Replace PCM, then go to next step.

(See PCM REMOVAL/INSTALLATION[AJ (3.0L Duratec)].)

Go to the next step.

VERIFY AFTER REPAIR PROCEDURE

• Perform "AFTER REPAIR PROCEDURE".

(See AFTER REPAIR PROCEDURE[AJ (3.0L Duratec)].)

• Is there any DTC present?

Yes

Go to applicable DTC inspection.

(See DTC TABLE[AJ (3.0L Duratec)].)

Troubleshooting completed.