Nissan Pathfinder (2007 year). Manual - part 189

DTC P0441 EVAP CONTROL SYSTEM

EC-379

C

D

E

F

G

H

I

J

K

L

M

A

EC

2007 Pathfinder

8.

Verify that EVAP control system pressure sensor value stays 0.1V less than the value at idle speed (mea-
sured at step 6) for at least 1 second.

9.

If NG, go to 

EC-379, "Diagnostic Procedure"

  .

Diagnostic Procedure

UBS00K92

1. 

CHECK EVAP CANISTER

1.

Turn ignition switch OFF.

2.

Check EVAP canister for cracks.

OK or NG

OK (With CONSULT-II)>>GO TO 2.
OK (Without CONSULT-II)>>GO TO 3.
NG

>> Replace EVAP canister.

2. 

CHECK PURGE FLOW

 With CONSULT-II

1.

Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP ser-
vice port and install vacuum gauge. For the location of EVAP service port, refer to 

EC-33, "EVAPORATIVE

EMISSION LINE DRAWING"

  .

2.

Start engine and let it idle.

3.

Select “PURG VOL CONT/V” in “ACTIVE TEST” mode with CONSULT-II.

4.

Rev engine up to 2,000 rpm.

5.

Touch “Qd” and “Qu” on CONSULT-II screen to adjust “PURG
VOL CONT/V” opening and check vacuum existence.

OK or NG

OK

>> GO TO 7.

NG

>> GO TO 4.

3. 

CHECK PURGE FLOW

 Without CONSULT-II

1.

Start engine and warm it up to normal operating temperature.

2.

Stop engine.

3.

Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP ser-
vice port and install vacuum gauge. For the location of EVAP service port, refer to 

EC-33, "EVAPORATIVE

EMISSION LINE DRAWING"

  .

4.

Start engine and let it idle.
Do not depress accelerator pedal even slightly.

5.

Check vacuum gauge indication before 60 seconds passed after starting engine.

6.

Revving engine up to 2,000 rpm after 100 seconds passed after starting engine.

OK or NG

OK

>> GO TO 7.

NG

>> GO TO 4.

PURG VOL CONT/V

Vacuum

100%

Should exist.

0%

Should not exist.

PBIB1678E

Vacuum should not exist.

Vacuum should exist.

EC-380

DTC P0441 EVAP CONTROL SYSTEM

2007 Pathfinder

4. 

CHECK EVAP PURGE LINE

1.

Turn ignition switch OFF.

2.

Check EVAP purge line for improper connection or disconnection.
Refer to 

EC-33, "EVAPORATIVE EMISSION LINE DRAWING"

  .

OK or NG

OK

>> GO TO 5.

NG

>> Repair it.

5. 

CHECK EVAP PURGE HOSE AND PURGE PORT

1.

Disconnect purge hoses connected to EVAP service port (A)
and EVAP canister purge volume control solenoid valve (B).

2.

Blow air into each hose and EVAP purge port (C).

3.

Check that air flows freely.

OK or NG

OK (With CONSULT-II)>>GO TO 6.
OK (Without CONSULT-II)>>GO TO 7.
NG

>> Repair or clean hoses and/or purge port.

6. 

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

 With CONSULT-II

1.

Start engine.

2.

Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with
CONSULT-II. Check that engine speed varies according to the
valve opening.

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 7.

7. 

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to 

EC-403, "Component Inspection"

  .

OK or NG

OK

>> GO TO 8.

NG

>> Replace EVAP canister purge volume control solenoid valve.

SEF367U

SEF368U

PBIB1678E

DTC P0441 EVAP CONTROL SYSTEM

EC-381

C

D

E

F

G

H

I

J

K

L

M

A

EC

2007 Pathfinder

8. 

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR

1.

Disconnect EVAP control system pressure sensor harness connector.

2.

Check connectors for water.

OK or NG

OK

>> GO TO 9.

NG

>> Replace EVAP control system pressure sensor.

9. 

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR FUNCTION

Refer to 

EC-422, "DTC Confirmation Procedure"

   for DTC P0452, 

EC-428, "DTC Confirmation Procedure"

for P0453.

OK or NG

OK

>> GO TO 10.

NG

>> Replace EVAP control system pressure sensor.

10. 

CHECK RUBBER TUBE FOR CLOGGING

1.

Disconnect rubber tube connected to EVAP canister vent control valve.

2.

Check the rubber tube for clogging.

OK or NG

OK

>> GO TO 11.

NG

>> Clean the rubber tube using an air blower.

11. 

CHECK EVAP CANISTER VENT CONTROL VALVE

Refer to 

EC-410, "Component Inspection"

  .

OK or NG

OK

>> GO TO 12.

NG

>> Replace EVAP canister vent control valve.

12. 

CHECK EVAP PURGE LINE

Inspect EVAP purge line (pipe and rubber tube). Check for evidence of leaks.
Refer to 

EC-33, "EVAPORATIVE EMISSION LINE DRAWING"

  .

OK or NG

OK

>> GO TO 13.

NG

>> Replace it.

13. 

CLEAN EVAP PURGE LINE

Clean EVAP purge line (pipe and rubber tube) using air blower.

>> GO TO 14.

14. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-145, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

  .

>> INSPECTION END

Water should not exist.

EC-382

DTC P0442 EVAP CONTROL SYSTEM

2007 Pathfinder

DTC P0442 EVAP CONTROL SYSTEM

PFP:14950

On Board Diagnosis Logic

UBS00K93

This diagnosis detects leaks in the EVAP purge line using engine intake manifold vacuum.
If pressure does not increase, the ECM will check for leaks in the line between the fuel tank and EVAP canister
purge volume control solenoid valve, under the following Vacuum test conditions.
The EVAP canister vent control valve is closed to shut the EVAP purge line off. The EVAP canister purge vol-
ume control solenoid valve will then be opened to depressurize the EVAP purge line using intake manifold
vacuum. After this occurs, the EVAP canister purge volume control solenoid valve will be closed.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0442
0442

EVAP control system 
small leak detected 
(negative pressure)

EVAP control system has a leak, EVAP 
control system does not operate prop-
erly.

●

Incorrect fuel tank vacuum relief valve

●

Incorrect fuel filler cap used

●

Fuel filler cap remains open or fails to close.

●

Foreign matter caught in fuel filler cap.

●

Leak is in line between intake manifold and 
EVAP canister purge volume control solenoid 
valve.

●

Foreign matter caught in EVAP canister vent 
control valve.

●

EVAP canister or fuel tank leaks

●

EVAP purge line (pipe and rubber tube) leaks

●

EVAP purge line rubber tube bent

●

Loose or disconnected rubber tube

●

EVAP canister vent control valve and the circuit

●

EVAP canister purge volume control solenoid 
valve and the circuit

●

Fuel tank temperature sensor

●

O-ring of EVAP canister vent control valve is 
missing or damaged

●

EVAP canister is saturated with water

●

EVAP control system pressure sensor

●

Fuel level sensor and the circuit

●

Refueling EVAP vapor cut valve

●

ORVR system leaks

PBIB1026E

DTC P0442 EVAP CONTROL SYSTEM

EC-383

C

D

E

F

G

H

I

J

K

L

M

A

EC

2007 Pathfinder

CAUTION:

●

Use only a genuine NISSAN fuel filler cap as a replacement. If an incorrect fuel filler cap is used,
the MIL may come on.

●

If the fuel filler cap is not tightened properly, the MIL may come on.

●

Use only a genuine NISSAN rubber tube as a replacement.

DTC Confirmation Procedure

UBS00K94

NOTE:

●

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait
at least 10 seconds before conducting the next test.

TESTING CONDITION:

●

Perform “DTC WORK SUPPORT” when the fuel level is between 1/4 and 3/4 full, and vehicle is
placed on flat level surface.

●

Always perform test at a temperature of 0 to 30

°

C (32 to 86

°

F).

 WITH CONSULT-II

1.

Turn ignition switch ON.

2.

Turn ignition switch OFF and wait at least 10 seconds.

3.

Turn ignition switch ON and select “DATA MONITOR” mode with
CONSULT-II.

4.

Make sure that the following conditions are met.
COOLAN TEMP/S: 0 - 70

°

C (32 - 158

°

F)

INT/A TEMP SE: 0 - 30

°

C (32 - 86

°

F)

5.

Select “EVP SML LEAK P0442/P1442” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode
with CONSULT-II.
Follow the instruction displayed.

NOTE:
If the engine speed cannot be maintained within the range displayed on the CONSULT-II screen, go to

EC-70, "Basic Inspection"

  .

PBIB2643E

PBIB0829E

EC-384

DTC P0442 EVAP CONTROL SYSTEM

2007 Pathfinder

6.

Make sure that “OK” is displayed.
If “NG” is displayed, refer to 

EC-384, "Diagnostic Procedure"

  .

NOTE:
Make sure that EVAP hoses are connected to EVAP canister
purge volume control solenoid valve properly.

 WITH GST

NOTE:
Be sure to read the explanation of 

EC-57, "Driving Pattern"

    before driving vehicle.

1.

Start engine.

2.

Drive vehicle according to 

EC-57, "Driving Pattern"

  .

3.

Stop vehicle.

4.

Turn ignition switch OFF, wait at least 10 seconds, and then turn ON.

5.

Select Service $07 with GST.

–

If P0442 is displayed on the screen, go to 

EC-384, "Diagnostic Procedure"

  .

–

If P0441 is displayed on the screen, go to 

EC-379, "Diagnostic Procedure"

  .

Diagnostic Procedure

UBS00K95

1. 

CHECK FUEL FILLER CAP DESIGN

1.

Turn ignition switch OFF.

2.

Check for genuine NISSAN fuel filler cap design.

OK or NG

OK

>> GO TO 2.

NG

>> Replace with genuine NISSAN fuel filler cap.

2. 

CHECK FUEL FILLER CAP INSTALLATION

Check that the cap is tightened properly by rotating the cap clockwise.

OK or NG

OK

>> GO TO 3.

NG

>> 1. Open fuel filler cap, then clean cap and fuel filler neck threads using air blower.

2. Retighten until ratcheting sound is heard.

3. 

CHECK FUEL FILLER CAP FUNCTION

Check for air releasing sound while opening the fuel filler cap.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

SEC763C

SEF915U

DTC P0442 EVAP CONTROL SYSTEM

EC-385

C

D

E

F

G

H

I

J

K

L

M

A

EC

2007 Pathfinder

4. 

CHECK FUEL TANK VACUUM RELIEF VALVE

Refer to 

EC-35, "FUEL TANK VACUUM RELIEF VALVE (BUILT INTO FUEL FILLER CAP)"

  .

OK or NG

OK

>> GO TO 5.

NG

>> Replace fuel filler cap with a genuine one.

5. 

INSTALL THE PRESSURE PUMP

To locate the EVAP leak, install EVAP service port adapter and pres-
sure pump to EVAP service port securely. For the location of EVAP
service port, refer to 

EC-33, "EVAPORATIVE EMISSION LINE

DRAWING"

  .

NOTE:
Improper installation of the EVAP service port adapter to the EVAP service port may cause leaking.

With CONSULT-II>>GO TO 6.
Without CONSULT-II>>GO TO 7.

BBIA0550E

SEF916U

EC-386

DTC P0442 EVAP CONTROL SYSTEM

2007 Pathfinder

6. 

CHECK FOR EVAP LEAK

 With CONSULT-II

1.

Turn ignition switch ON.

2.

Select “EVAP SYSTEM CLOSE” of “WORK SUPPORT” mode with CONSULT-II.

3.

Touch “START” and apply pressure into the EVAP line until the
pressure indicator reaches the middle of the bar graph.

CAUTION:

●

Never use compressed air or a high pressure pump.

●

Do not exceed 4.12 kPa (0.042 kg/cm

2

  , 0.6 psi) of pres-

sure in the system.

4.

Using EVAP leak detector, locate the EVAP leak. For the leak
detector, refer to the instruction manual for more details.
Refer to 

EC-33, "EVAPORATIVE EMISSION LINE DRAWING"

  .

OK or NG

OK

>> GO TO 8.

NG

>> Repair or replace.

7. 

CHECK FOR EVAP LEAK

 Without CONSULT-II

1.

Turn ignition switch OFF.

2.

Apply 12 volts DC to EVAP canister vent control valve. The
valve will close. (Continue to apply 12 volts until the end of test.)

3.

Pressurize the EVAP line using pressure pump with 1.3 to 2.7
kPa (10 to 20 mmHg, 0.39 to 0.79 inHg), then remove pump and
EVAP service port adapter.

CAUTION:

●

Never use compressed air or a high pressure pump.

●

Do not exceed 4.12 kPa (0.042 kg/cm

2

  , 0.6 psi) of pres-

sure in the system.

4.

Using EVAP leak detector, locate the EVAP leak. For the leak
detector, refer to the instruction manual for more details. Refer
to 

EC-33, "EVAPORATIVE EMISSION LINE DRAWING"

  .

OK or NG

OK

>> GO TO 8.

NG

>> Repair or replace.

PEF917U

SEF200U

BBIA0551E

SEF200U