IMPORTANT SERVICE
INFORMATION FOR:

 SERVICE MANAGER
 SERVICE ADVISOR
 TECHNICIAN
 PARTS DEPARTMENT
 WARRANTY PERSONNEL

BULLETIN NUMBER:
CB16-J-001
ISSUE DATE:
FEBRUARY 2016
GROUP:
ENGINE

VOLUNTARY EMISSION RECALL
DTC P0401 CALIBRATION ERROR – REPROGRAM ECM (#V1602)
AFFECTED VEHICLES


2016MY Isuzu N-Series Trucks

Equipped with 5.2L (4HK1) Diesel Engines
INFORMATION
CONDITION
Isuzu Motors Limited has determined that certain 2016 model year Isuzu N-Series
trucks equipped with 5.2L (4HK1) diesel engines were built with an Engine Control
Module (ECM) containing an On Board Diagnostic (OBD) calibration error for Diagnostic
Trouble Code (DTC) P0401.
CORRECTION
Dealers are to reprogram the ECM with a corrected service calibration. This service will
be performed for the customer at no charge.
NOTE: California dealers must issue a “Proof of Correction Certificate” to owners of the
affected vehicles after completing the work specified below. Please instruct the Isuzu
owner to keep that Certificate as the California Department of Motor Vehicles may ask
for proof of this campaign completion before renewal of the registration.
IMPORTANT: Dealers must fill out every field on the Proof of Correction
Certificate.
VEHICLES INVOLVED
Involved are certain 2016 model year Isuzu N-Series trucks equipped with 5.2L (4HK1)
diesel engines.
IMPORTANT: Dealers are to confirm vehicle eligibility prior to beginning repairs
by using the Isuzu Vehicle Inquiry System (IVIS).
For dealers with involved vehicles, a report of involved vehicles containing the complete
vehicle identification number has been or will be provided. Dealers will not have a report
available if they have no involved vehicles currently assigned.

SERVICE PROCEDURE
1. Using Isuzu Diagnostic Service System (IDSS II) version 9.3.1 or later,
reprogram the ECM to the latest service calibration part number.
IMPORTANT: IDSS II releases prior to 9.3.1 will not correct this condition.
Be sure IDSS II is updated to or beyond version 9.3.1 before
reprogramming.
Affected calibration part numbers are listed for reference only.
Model

OBD Error Affected Calibration
Part Number

NPRHD
NPRXD
NQR
NRR

98344932 or Higher

2. Apply the campaign label.
APPLYING THE CAMPAIGN LABEL
1. Using a ball-point pen, fill in a campaign label (Part No. 2-90028-700-0) with
campaign #V1602, Isuzu dealer code, and repair date.
2. Affix the campaign label onto the driver's side B-pillar.

CALIFORNIA VEHICLES ONLY
When a California emissions campaign is completed by an Isuzu dealer, the dealer
must provide the vehicle owner a “Proof of Correction Certificate”, which the owner may
need to present to the California Department of Motor Vehicles (DMV) when renewing
their vehicle registration. Without this correction certificate, the owner may be unable to
renew their vehicle registration. As set forth in the sample owner notification letter below,
the owner will need to submit the correction certificate to the DMV only if the DMV
requests it. Otherwise, we recommend that owners keep the certificate for their records.

2

Example, Proof of Correction Certificate

WARRANTY INFORMATION
Submit a Campaign Claim with the information indicated below.
LABOR CODE

DESCRIPTION

LABOR TIME

V1602

OBD Calibration Error Update (DTC P0401)

0.4

Refer to the Isuzu ICS Claims Processing Manual for details on Campaign Claim
Submission.
OWNER NOTIFICATION
Notification letters will be sent to owners of affected vehicles already retailed. (See
enclosed copies).
DEALER RESPONSIBILITY
All unsold new vehicles in dealers' possession and subject to this recall must be held
and inspected/repaired per the inspection and service procedures of this recall
campaign bulletin before customers take possession of these vehicles.
Customers who have recently purchased vehicles sold from your vehicle inventory, and
for which there is no customer information indicated on the dealer listing, are to be
contacted by the dealer. Arrangements are to be made to make the required correction
according to the instructions contained in this bulletin. A copy of the customer letter is
provided in this bulletin for your use in contacting customers. Program follow-up cards
should not be used for this purpose, since the customer may not as yet have received
the notification letter.
In summary, whenever a vehicle subject to this recall enters your vehicle inventory, or is
in your dealership, you must take the steps necessary to be sure the recall correction
has been made before selling or releasing the vehicle.

3

SAMPLE OWNER LETTER – US (ENGLISH)

VOLUNTARY EMISSION RECALL
DTC P0401 CALIBRATION ERROR – REPROGRAM ECM (#V1602)
This notice applies to your vehicle,

MARCH 2016
Dear Customer:
This notice is sent to inform you that Isuzu Commercial Truck of America, Inc. is conducting a voluntary
emission recall that includes your vehicle, , 2016MY .
CONDITION
Isuzu Motors Limited has determined that certain 2016 model year Isuzu N-Series trucks equipped with
5.2L (4HK1) diesel engines were built with an Engine Control Module (ECM) containing an On Board
Diagnostic (OBD) calibration error for Diagnostic Trouble Code (DTC) P0401.
WHAT WE WILL DO
The ECM will be reprogrammed with the proper OBD calibration. This service will be performed for you
at no charge.
WHAT YOU SHOULD DO
We recommend that you contact your local Isuzu dealer as soon as possible to schedule an appointment.
Instructions for reprogramming the ECM have been sent to your dealer. Isuzu estimates that the remedy
will take approximately 20 minutes to perform. However, additional time may be necessary depending on
how appointments are scheduled and processed at your dealership.
EMISSION WARRANTY INFORMATION
In order to ensure your full protection under the emission warranty made applicable to your vehicle by
State and Federal Law, it is recommended that you have your vehicle serviced as soon as possible. In
addition, in some states participation in an emission recall may be necessary to renew the vehicle
registration.
CALIFORNIA OWNERS
Once the campaign is completed, you will receive a “Proof of Correction Certificate” from the dealer
performing the campaign, which may need to be presented to the California Department of Motor
Vehicles when you renew your vehicle registration.
To locate the nearest Isuzu dealer you can visit our website at www.isuzucv.com and click on the dealer
locator link and enter your zip code or state. Should you not have access to a computer terminal please
contact our Customer Relations Department by calling 1-866-441-9638.
We regret any inconvenience this action may cause you; however, we have taken this action in the
interest of your continued satisfaction with our products.
Sincerely,
Isuzu Commercial Truck of America, Inc.
Important: If you have sold or traded your Isuzu vehicle, please enter the owner's name and address, if known, on the attac hed "Change of
Information" postcard, tear off at both perforations, and drop it in the mail. Postage has already been paid. We will contact the new owner.
Federal law requires that any vehicle lessor receiving this recall notice must forward a copy of this notice to the lessee within ten days. Lessor
means a person or entity that is the owner, as reflected on the vehicle title, of any five or more leased vehicles.

4