Nissan Xterra. Manual - part 291

EC-290

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

P0441 EVAP CONTROL SYSTEM

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 DRAIN FILTER

Refer to 

EC-290, "Component Inspection"

.

OK or NG

OK

>> GO TO 10.

NG

>> Replace drain filter.

12.

CHECK EVAP CANISTER VENT CONTROL VALVE

Refer to 

EC-309, "Component Inspection"

.

OK or NG

OK

>> GO TO 13.

NG

>> Replace EVAP canister vent control valve. Refer to 

FL-16, "Removal and Installation"

.

13.

CHECK EVAP PURGE LINE

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

Refer to 

EC-32, "Description"

.

OK or NG

OK

>> GO TO 14.

NG

>> Replace it.

14.

CLEAN EVAP PURGE LINE

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

>> GO TO 15.

15.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

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DRAIN FILTER

1. Check visually for insect nests in the drain filter air inlet.
2. Check visually for cracks or flaws in the appearance.
3. Check visually for cracks or flaws in the hose.
4. Blow air into port A and check that it flows freely out of port B.
5. Block port B.
6. Blow air into port A and check that there is no leakage.
7. If NG, replace drain filter.

PBIB3641E

P0442 EVAP CONTROL SYSTEM

EC-291

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P0442 EVAP CONTROL SYSTEM

On Board Diagnosis Logic

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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.

CAUTION:

• Use only a genuine NISSAN fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the

MIL may illuminate.

• If the fuel filler cap is not tightened properly, the MIL may illuminate.

• Use only a genuine NISSAN rubber tube as a replacement.

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 con-

trol 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

• Drain filter
• 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

PBIB3640E

EC-292

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

P0442 EVAP CONTROL SYSTEM

DTC Confirmation Procedure

INFOID:0000000009483997

NOTE:

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-

ing the next step.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

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

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.

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 V/S LEAK P0456/P1456” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode

with CONSULT.

Follow the instructions displayed.

NOTE:

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

EC-

118, "Basic Inspection"

.

6. Make sure that “OK” is displayed.

If “NG” is displayed, refer to 

EC-292, "Diagnosis 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 Driving Pattern ON 

EC-130, "SRT Set Driving Pattern"

 before driving vehi-

cle.

1. Start engine.

2. Drive vehicle according to Driving Pattern, 

EC-47, "DIAGNOSIS DESCRIPTION : Driving Pattern"

.

3. Stop vehicle.

4. Turn ignition switch OFF, wait at least 10 seconds.

5. Turn ignition switch ON.

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

7. Select Service $07 with GST.

-

If P0442 is displayed on the screen, go to 

EC-292, "Diagnosis Procedure"

.

-

If P0441 is displayed on the screen, go to 

EC-287, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009483998

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.

SEF915U

P0442 EVAP CONTROL SYSTEM

EC-293

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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.

4.

CHECK FUEL TANK VACUUM RELIEF VALVE

Refer to 

EC-297, "Component Inspection"

.

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 (2) securely. For the location of

EVAP service port, refer to 

EC-32, "Description"

.

NOTE:

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

With CONSULT>>GO TO 6.

Without CONSULT>>GO TO 7.

6.

CHECK FOR EVAP LEAK

With CONSULT

1. Turn ignition switch ON.

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

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.

1

: EVAP canister purge volume control solenoid valve 
(view with intake air duct removed)

3.

: Oil filler cap

: Front

AWBIA0687ZZ

SEF916U