ITB13-044g

Classification:
Reference:
Date:
EC13-015g
ITB13-044g
January 29, 2019
ALL MODEL YEAR 2012 AND NEWER INFINITI VEHICLES;
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 model year 2012 and newer Infiniti vehicles
SERVICE INFORMATION
Example
All model year 2012 and newer Infiniti vehicles have a warning indicator in
the instrument area to alert the driver of a loose fuel filler cap (see Figure 1
example).
Figure 1

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.

Make sure the customer is informed of the proper fuel filler cap installation.

Customers 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.

If one or more of these EVAP leak DTCs are stored (P0442, P0455, P0456), a loose fuel filler cap
may be the cause.

If P0442, P0455, and/or P0456 is found stored, begin vehicle EVAP system diagnosis using the
Flow Chart on the next page.
 A test drive is not part of the DTC confirmation or diagnostic procedures for these DTCs.
 Test-driving the vehicle for these DTCs will only waste time.
 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 dealer.
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
No
• P0455
• P0456
This bulletin does
not apply
Yes
Connect CONSULT-III plus (C-III
plus) to the vehicle
NOTE: A “smoke” leak detection
machine may be used. Follow the
manufacturer’s operating
instructions.
1. Confirm fuel filler cap is secure
2. Connect essential tool
J-42909 (see page 3 or 4)
3. Using Active Test, close vent
control valve
4. Apply pressure using
J-42909 until bar graph reaches
about halfway
5. Monitor the bar graph for
10 minutes
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?
•
NO EVAP LEAK detected
at this time
•
MIL ON due to fuel filler
cap not being properly
secured (loose)
•
Erase DTC(s)
•
Advise customer fuel filler
cap ALWAYS needs to be
properly secured
•
DO NOT REPLACE FUEL
FILLER CAP OR ANY
OTHER EVAP RELATED
PARTS
Yes
No
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
ITB13-044g
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
ITB13-044g
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
ITB13-044g
CLAIMS INFORMATION
Submit a Primary Part (PP) type line claim using the following claims coding:
DESCRIPTION
PFP
OP CODE
SYM
EVAP System Leak Test
(1)
FX47AA
ZE
DIA
FRT
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
REFERENCE
DESCRIPTION
November 15, 2013
ITB13-044
Original bulletin published
September 16, 2014
ITB13-044a
Amended Applied Vehicles, Service Information, Claims
Information
May 29, 2015
ITB13-044b
Amended Applied Vehicles
February 4, 2016
ITB13-044c
Amended Applied Vehicles
August 4, 2016
ITB13-044d
Amended Applied Vehicles
March 30, 2017
ITB13-044e
Amended Applied Vehicles
August 15, 2018
ITB13-044f
Amended Applied Vehicles, Service Procedure
January 29, 2019
ITB13-044g
Amended Applied Vehicles
5/5
ITB13-044g