Nissan Frontier. Manual - part 557

 

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Nissan Frontier. Manual - part 557

 

 

P0455 EVAP CONTROL SYSTEM

EC-799

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE FOR USA AND CANADA]

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2. Check valve opening pressure and vacuum.

3. If out of specification, replace fuel filler cap as an assembly.

CAUTION:

Use only a genuine fuel filler cap as a replacement. If an incor-

rect fuel filler cap is used, the MIL may illuminate.

Pressure: 15.3 - 20.0 kPa (0.156 - 0.204 kg/cm

2

, 2.22 - 

2.90 psi)

Vacuum:

6.0 to 3.3 kPa (0.061 to 0.034 kg/cm

2

0.87 to 0.48 psi)

SEF943S

EC-800

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE FOR USA AND CANADA]

P0456 EVAP CONTROL SYSTEM

P0456 EVAP CONTROL SYSTEM

On Board Diagnosis Logic

INFOID:0000000009481457

This diagnosis detects very small leaks in the EVAP line between fuel tank and EVAP canister purge volume

control solenoid valve, using the negative pressure.

If ECM judges a leak which corresponds to a very small leak, the very small leak P0456 will be detected.

If ECM judges a leak equivalent to a small leak, EVAP small leak P0442 will be detected.

If ECM judges that there are no leaks, the diagnosis will be OK.

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

P0456
0456

Evaporative emission 
control system very 
small leak (negative 
pressure check)

• EVAP system has a very small leak.
• EVAP 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 miss-

ing or damaged

• EVAP canister is saturated with water
• EVAP control system pressure sensor
• Refueling EVAP vapor cut valve
• ORVR system leaks
• Fuel level sensor and the circuit
• Foreign matter caught in EVAP canister purge vol-

ume control solenoid valve

PBIB3640E

P0456 EVAP CONTROL SYSTEM

EC-801

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE FOR USA AND CANADA]

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DTC Confirmation Procedure

INFOID:0000000009481458

NOTE:

• If DTC P0456 is displayed with P0442, first perform trouble diagnosis for DTC P0456.

• After repair, check that the hoses and clips are installed properly.

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

ducting 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:

• Open engine hood before conducting the following procedure.

• If any of following conditions are met just before the DTC confirmation procedure, leave the vehicle

for more than 1 hour.

Fuel filler cap is removed.

Fuel is refilled or drained.

EVAP component part/parts is/are removed.

• Before performing the following procedure, confirm that battery voltage is more than 11V at idle.

 WITH CONSULT

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

2. Check that the following conditions are met.

FUEL LEVEL SE: 0.25 - 1.4V

COOLAN TEMP/S: 0 - 32

°C (32 - 90°F)

FUEL T/TMP SE: 0 - 35

°C (32 - 95°F)

INT A/TEMP SE: More than 0

°C (32°F)

If NG, turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle), or refill/drain fuel

until the output voltage of the “FUEL LEVEL SE” meets within the range above and leave the vehicle for

more than 1 hour. Then start from step 1.

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

4. Turn ignition switch ON.

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

with CONSULT.

Follow the instruction displayed.

6. Check that “OK” is displayed.

If “NG” is displayed, refer to 

EC-802, "Diagnosis Procedure"

.

NOTE:

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

EC-584, "Basic Inspection"

.

• Check that EVAP hoses are connected to EVAP canister purge volume control solenoid valve

properly.

Overall Function Check

INFOID:0000000009481459

 WITH GST

Use this procedure to check the overall function of the EVAP very small leak function. During this check, a 1st

trip DTC might not be confirmed.

CAUTION:

• Never use compressed air, doing so may damage the EVAP system.

• Never start engine.
• Never exceeded 4.12 kPa (0.042 kg/cm

2

, 0.6 psi).

EC-802

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE FOR USA AND CANADA]

P0456 EVAP CONTROL SYSTEM

1. Attach the EVAP service port adapter securely to the EVAP ser-

vice port.

2. Set the pressure pump and a hose.

3. Also set a vacuum gauge via 3-way connector and a hose.

4. Turn ignition switch ON.

5. Connect GST and select Service $08.

6. Using Service $08 control the EVAP canister vent control valve

(close).

7. Apply pressure and check the following conditions are satisfied.

Pressure to be applied: 2.7 kPa (0.028 kg/cm

2

, 0.39 psi)

Time to be waited after the pressure drawn in to the EVAP

system and the pressure to be dropped: 60 seconds and

the pressure should not be dropped more than 0.4 kPa
(0.004 kg/cm

2

, 0.06 psi).

If NG, go to 

EC-802, "Diagnosis Procedure"

.

If OK, go to next step.

8. Disconnect GST.

9. Start engine and warm it up to normal operating temperature.

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

11. Turn ignition switch ON.

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

13. Restart engine and let it idle for 90 seconds.

14. Keep engine speed at 2,000 rpm for 30 seconds.

15. Turn ignition switch OFF.

NOTE:

For more information, refer to GST instruction manual.

Diagnosis Procedure

INFOID:0000000009481460

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.

BBIA0550E

SEF462UI

SEF915U

 

 

 

 

 

 

 

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