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Infiniti Q45. Manual - part 453

DTC P0455 EVAP CONTROL SYSTEM

EC-451

DTC P0455 EVAP CONTROL SYSTEM

PFP:14950

On Board Diagnosis Logic

NBS001XV

NOTE:
If DTC P0455 is displayed with P0447, first perform trouble diagnosis for DTC P0447. (See

EC-419

This diagnosis detects a very large leak (fuel filler cap fell off etc.) in EVAP system between the fuel tank and
EVAP canister purge volume control solenoid valve.

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 No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0455
0455

EVAP control system
gross leak detected

EVAP control system has a very large leak
such as fuel filler cap fell off, EVAP control
system does not operate properly.

●

Fuel filler cap remains open or fails to
close.

●

Incorrect fuel tank vacuum relief valve

●

Incorrect fuel filler cap used

●

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.

●

Blocked or bent rubber tube to EVAP
control system pressure sensor

●

Loose or disconnected rubber tube

●

EVAP canister vent control valve and the
circuit

●

EVAP canister purge volume control sole-
noid valve and the circuit

●

Fuel tank temperature sensor

●

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

●

EVAP control system pressure sensor

●

Refueling control valve

●

ORVR system leaks

SEF323U

EC-452

DTC P0455 EVAP CONTROL SYSTEM

DTC Confirmation Procedure

NBS001XW

CAUTION:

Never remove fuel filler cap during the DTC Confirmation Procedure.
NOTE:

●

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

●

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.

●

Open engine hood before conducting the following procedures.

WITH CONSULT-II

Tighten fuel filler cap securely until ratcheting sound is heard.

Turn ignition switch ON.

Turn ignition switch OFF and wait at least 10 seconds.

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

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

C (32 - 158

INT/A TEMP SE: 0 - 60

C (32 - 140

Select “EVAP 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-71, "Basic Inspection"

Make sure that “OK” is displayed.
If “NG” is displayed, select “SELF-DIAG RESULTS” mode and
make sure that “EVAP GROSS LEAK [P0455]” is displayed. If it
is displayed, refer to

EC-453, "Diagnostic Procedure"

If P0442 is displayed, go to

EC-398, "Diagnostic Procedure"

If P1442 is displayed, go to

EC-548, "Diagnostic Procedure"

PBIB2869E

PBIB0829E

SEC763C

DTC P0455 EVAP CONTROL SYSTEM

EC-453

WITH GST

NOTE:
Be sure to read the explanation of

EC-58, "Driving Pattern"

before driving vehicle.

Start engine.

Drive vehicle according to

EC-58, "Driving Pattern"

Stop vehicle.

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

Select “Service $07” with GST.

●

If P0455 is displayed on the screen, go to

EC-453, "Diagnostic Procedure"

●

If P0442 is displayed on the screen, go to

EC-398, "Diagnostic Procedure"

●

If P0441 is displayed on the screen, go to

EC-393, "Diagnostic Procedure"

●

If P1442 is displayed on the screen, go to

EC-548, "Diagnostic Procedure"

Diagnostic Procedure

NBS001XX

CHECK FUEL FILLER CAP DESIGN

Turn ignition switch OFF.

Check for genuine NISSAN fuel filler cap design.

OK or NG

>> GO TO 2.

>> Replace with genuine NISSAN fuel filler cap.

CHECK FUEL FILLER CAP INSTALLATION

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

OK or NG

>> GO TO 3.

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

2. Retighten until ratcheting sound is heard.

CHECK FUEL FILLER CAP FUNCTION

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

OK or NG

>> GO TO 5.

>> GO TO 4.

CHECK FUEL TANK VACUUM RELIEF VALVE

Refer to

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

OK or NG

>> GO TO 5.

>> Replace fuel filler cap with a genuine one.

SEF915U

EC-454

DTC P0455 EVAP CONTROL SYSTEM

CHECK EVAP PURGE LINE

Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks, improper connection or
disconnection.
Refer to

EC-33, "EVAPORATIVE EMISSION LINE DRAWING"

OK or NG

>> GO TO 6.

>> Repair or reconnect the hose.

CLEAN EVAP PURGE LINE

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

>> GO TO 7.

CHECK EVAP CANISTER VENT CONTROL VALVE, O-RING AND CIRCUIT

Refer to

EC-420, "DTC Confirmation Procedure"

OK or NG

>> GO TO 8.

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

INSTALL THE PRESSURE PUMP

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

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

With CONSULT-II>>GO TO 9.
Without CONSULT-II>>GO TO 10.

PBIB3131E

SEF916U

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