ITB13-044J

Classification:
Reference:
Date:
EC13-015J
ITB13-044J
February 7, 2022
EVAP LEAK DTC P0442, P0455, P0456 INFORMATION
This bulletin has been amended. See AMENDMENT HISTORY on the last page.
Please discard previous versions of this bulletin.
APPLIED VEHICLES:
All 2012 and newer Infiniti vehicles
SERVICE INFORMATION
All APPLIED VEHICLES have a warning indicator in the instrument area to
alert the driver of a loose fuel filler cap (see Figure 1 example).

If a vehicle displays a loose fuel filler cap warning light or message,
the driver should safely stop the vehicle and make sure the fuel filler
cap is installed correctly.
Example
Figure 1

Make sure the client is informed of the proper fuel filler cap installation.

Clients should refer to their vehicle Owner’s Manual for specific details on the “LOOSE FUEL CAP”
warning system and fuel filler cap installation.
If a fuel filler cap is left loose for multiple trips, DTCs will be stored and the MIL will illuminate.

A loose fuel filler cap may be the cause if one or more of these EVAP leak DTCs are stored: P0442,
P0455, P0456.

If P0442, P0455, and/or P0456 is found stored, begin vehicle EVAP system diagnosis using the
FLOW CHART on the next page.
o A test drive is not part of the DTC confirmation or diagnostic procedures for these DTCs.
o Test-driving the vehicle for these DTCs will only waste time.
o The diagnostic procedure in this bulletin must be used for these DTCs for an effective repair.
NOTE: Any parts replaced under warranty for repair of these DTCs are on automatic parts return to
NNA for inspection. Any part found to be functional will cause a charge-back to the retailer.
Infiniti 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
FLOW CHART
Were any of the following DTCs found
stored?



P0442
P0455
P0456
This bulletin does
not apply
No
Yes
1. Confirm the fuel filler cap is
secure
2. Connect essential tool J-42909
(see page 3 or 4)
3. Using Active Test, close the vent
control valve
4. Apply pressure using J-42909
until the bar graph reaches about
halfway
5. Monitor the bar graph for
10 minutes
NOTE: A “smoke” leak detection
machine may be used. Follow the
manufacturer’s operating
instructions.
 NO EVAP LEAK detected
at this time
 MIL ON due to fuel filler
cap not being properly
secured (loose)
Models without a service port: check
for purge control valve leak
(see page 4)
Bar graph remained stable and
purge control valve is not leaking?
 Erase DTC(s)
 Advise client fuel filler cap
ALWAYS needs to be
properly secured
Yes
No

DO NOT REPLACE FUEL
FILLER CAP OR ANY
OTHER EVAP RELATED
PARTS
EVAP leak detected
This bulletin does not apply

See CLAIMS
INFORMATION on page 5
Refer to ASIST and the applicable
Electronic Service Manual
for further diagnosis
2/5
ITB13-044J
Models with a Service Port
(2017 and older, except QX30)
Connect essential tool J-42909
to the service port and perform
EVAP system leak check.
There is no need to perform a
separate leak check of the purge
control valve.
Figure 2
EVAP System Basic Operation

Fuel vapor flows from fuel tank into canister (light blue area)

Vapor flows from canister through purge control valve (red line)

Fresh air flows into canister (green line)
3/5
ITB13-044J
Models without a Service Port
(2018 and Newer, and all QX30)
Disconnect the EVAP line at the
purge control valve.
Connect essential tool J-42909 to the
EVAP line and perform EVAP
system leak check.
Use special tool J-42909 to also
perform a separate leak check of the
purge control valve.
Figure 3
EVAP System Basic Operation

Fuel vapor flows from fuel tank into canister (light blue area)

Vapor flows from canister through purge control valve (red line)

Fresh air flows into canister (green line)
4/5
ITB13-044J
CLAIMS INFORMATION
Submit a Primary Part (PP) type line claim using the following claims coding:
DESCRIPTION
PFP
OP CODE
SYM
DIA
FRT
EVAP System Leak Test
(1)
FX47AA
ZE
32
0.4
(1) Refer to the electronic parts catalog and use the Fuel Cap part number (17251-xxxxx) as the primary failed
part.
AMENDMENT HISTORY
DATE
November 15, 2013
DESCRIPTION
REFERENCE
ITB13-044
Original bulletin published
September 16, 2014
ITB13-044A
SERVICE INFORMATION and CLAIMS INFORMATION
revised, and publication date updated to include the latest
models and model years
May 29, 2015
ITB13-044B
Publication date updated to include the latest models and
model years
February 4, 2016
ITB13-044C
SERVICE INFORMATION and FLOW CHART revised, and
publication date updated to include the latest models and
model years
August 4, 2016
ITB13-044D
Publication date updated to include the latest models and
model years
March 30, 2017
ITB13-044E
Publication date updated to include the latest models and
model years
August 15, 2018
ITB13-044F
SERVICE PROCEDURE revised, and publication date
updated to include the latest models and model years
January 29, 2019
ITB13-044G
Publication date updated to include the latest models and
model years
November 30, 2020
ITB13-044H
Publication date updated to include the latest models and
model years
March 1, 2021
ITB13-044I
Publication date updated to include the latest models and
model years
February 7, 2022
ITB13-044J
Publication date updated to include the latest models and
model years
5/5
ITB13-044J