Nissan Frontier. Manual - part 426

P0442 EVAP CONTROL SYSTEM

EC-275

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P0442 EVAP CONTROL SYSTEM

On Board Diagnosis Logic

INFOID:0000000009480935

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.

PBIB3640E

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 properly.

• 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

EC-276

< DTC/CIRCUIT DIAGNOSIS >

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P0442 EVAP CONTROL SYSTEM

DTC Confirmation Procedure

INFOID:0000000009480936

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

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-

117, "Basic Inspection"

.

6. Make sure that “OK” is displayed.

If “NG” is displayed, refer to 

EC-276, "Diagnosis Procedure"

.

NOTE:

Make sure that EVAP hoses are connected to the EVAP canister purge volume control solenoid

valve properly.

WITH GST

NOTE:

Be sure to read the explanation of 

EC-127, "SRT Set Driving Pattern"

 before driving vehicle.

1. Start engine.

2. Drive vehicle according to 

EC-127, "SRT Set Driving Pattern"

.

3. Stop vehicle.

4. Turn ignition switch OFF and 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-276, "Diagnosis Procedure"

.

-

If P0441 is displayed on the screen, go to 

EC-271, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009480937

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.

SEF915U

P0442 EVAP CONTROL SYSTEM

EC-277

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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-281, "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 securely.

For the location of EVAP service port.

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.
• Never exceed 4.12 kPa (0.042 kg/cm

2

, 0.6 psi) of pressure in the system.

BBIA0620E

SEF916U

EC-278

< DTC/CIRCUIT DIAGNOSIS >

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P0442 EVAP CONTROL 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-469, "How to Detect Fuel Vapor Leakage"

.

OK or NG

OK

>> GO TO 8.

NG

>> Repair or replace.

7.

CHECK FOR EVAP LEAK

Without CONSULT

1. Turn ignition switch OFF.

2. Apply 12 volts DC to EVAP canister vent control valve (1). The

valve will close. (Continue to apply 12 volts until the end of test.)

- EVAP control system pressure sensor (2)

- Drain filter (3)

- EVAP canister (4)
- 

: Vehicle front

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.
• Never exceed 4.12 kPa (0.042 kg/cm

2

, 0.6 psi) of pressure

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-469, "How to Detect Fuel Vapor Leakage"

.

OK or NG

OK

>> GO TO 8.

NG

>> Repair or replace.

8.

CHECK EVAP CANISTER VENT CONTROL VALVE

Check the following,

• EVAP canister vent control valve is installed properly.

Refer to 

FL-14, "Removal and Installation"

.

• EVAP canister vent control valve.

Refer to 

EC-292, "Component Inspection"

. 

OK or NG

OK

>> GO TO 9.

NG

>> Repair or replace EVAP canister vent control valve and O-ring.

9.

CHECK IF EVAP CANISTER IS SATURATED WITH WATER

1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor

attached.

SEF200U

ALBIA0514ZZ

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