Classification:

Reference:

EC25-019

Date:

ITB26-002

February 2, 2026

FUEL FILLER TUBE LOWER SEAL IS LEAKING
AND DTC P0456 IS STORED IN THE ECM
APPLIED VEHICLES:
APPLIED SYSTEMS:

2022-2026 QX60 (L51)
2025-2026 QX80 (Z63)
All model years with a capless fuel filler. This bulletin does
not apply to vehicles with a fuel cap.

IF YOU CONFIRM
The vehicle has a visible leak with a smoke machine test coming from the fuel filler tube
lower seal,
AND
DTC P0456 is stored as “Active”, “Past”, or “Pending” in the ECM.

ACTION
1. Remove the supplied funnel from the rear of the vehicle or trunk.
2. Insert the funnel completely in the fuel filler tube and remove completely five (5) times.
3. Re-check the fuel filler tube lower seal with a smoke machine to determine visually if
any leak is present.
4. If the fuel filler lower seal continues to leak, replace the fuel filler tube.

IMPORTANT: The purpose of ACTION (above) is to give you a quick idea of the work you
will be performing. You MUST closely follow the entire SERVICE PROCEDURE as it
contains information that is essential to successfully completing this repair.
Bulletins are intended for use by qualified technicians, not 'do-it-yourselfers'. Qualified technicians are
properly trained individuals who have the equipment, tools, safety instruction, and know-how to do a job
properly and safely. NOTE: If you believe that a described condition may apply to a particular vehicle, DO
NOT assume that it does. See your Infiniti retailer to determine if this applies to your vehicle.
1/5

REQUIRED SPECIAL TOOLS
•

Dual Purpose Diagnostic Leak Locator - RLD95-0139 (smoke machine)

Figure 1
o Dual Purpose Diagnostic Leak Locator was previously shipped as an essential
tool.
o Damaged or missing components can be replaced by calling Tech•Mate at
833-397-3493.

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ITB26-002

SERVICE PROCEDURE

To avoid risk of severe personal injury or death, follow all cautions, warnings, and notes in
the ESM when working on or near a fuel system.

1.

Remove the supplied funnel from the rear of the vehicle or trunk (Figure 2 and
Figure 3).

Accessory pack

Funnel

Figure 2

2.

Figure 3

Insert the funnel completely in the fuel filler tube and remove completely five (5) times.
HINT: The funnel must be inserted and removed completely to open and close the
lower seal inside the fuel filler tube (Figure 5).

Capless fuel filler

Upper seal
Funnel
Lower seal
Upper seal

Fuel filler tube

Figure 4

Figure 5

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ITB26-002

3.

Re-check the fuel filler tube lower seal (Figure 5 on page 3) for leaks with the smoke
machine to determine visually if any leak is present from the lower seal.
a. Remove the engine cover and locate the purge control solenoid in the engine
compartment (Figure 6).
b. Disconnect the hose from the purge control solenoid (Figure 6) that goes to the
fuel tank to allow access for the smoke machine.
c. Insert the smoke machine port into the hose that was just disconnected.
d. Turn on the smoke machine to fill the system with smoke.
e. Check for smoke leaking from the fuel filler tube with a bright light (Figure 7).

Purge control
solenoid hose to
be disconnected
Purge control solenoid

Front
Figure 6

Smoke from fuel
filler tube

Bright light
Figure 7

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ITB26-002

•

If no leak is present, the procedure is complete, and no further action is needed.

•

If the fuel filler tube continues to leak at the lower seal, replace the fuel filler tube.
o QX60 and QX80 - Refer to the ESM: ENGINE > FUEL SYSTEM > REMOVAL
AND INSTALLATION > FUEL TANK > Exploded View / Removal and
Installation

PARTS INFORMATION

(1)

DESCRIPTION

PART NUMBER

QUANTITY

TUBE ASSY – FILLER (Fuel Filler Tube)

(1)

1

Refer to the EPC and use the VIN to determine the correct part number for the TUBE
ASSY – FILLER (17221-xxxxx).

CLAIMS INFORMATION
Submit a Primary Part (PP) type line claim using the following claims coding:

(1)

DESCRIPTION

MODEL

Funnel Insertion and
Smoke Check

QX60 (L51)

PFP
(1)

QX80 (Z63)

OP CODE
FX73AA
FX75AA

SYM

DIA

ZE

53

FRT
1.2
1.7

Reference the electronic parts catalog and use the Fuel Filler Tube Assy (17221-*****)
as the Primary Failed Part (PFP).

If needed and on the same line

(2)

DESCRIPTION

OP CODE

SYM

DIA

FRT

Replace Fuel Filler Tube

FB30AA

ZE

53

(2)

Reference the current Infiniti Warranty Flat Rate Manual and use the indicated Flat
Rate Time (FRT).

AMENDMENT HISTORY
PUBLISHED DATE REFERENCE
February 2, 2026

ITB26-002

DESCRIPTION
Original bulletin published

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ITB26-002