IMPORTANT SERVICE
INFORMATION FOR:
 SERVICE MANAGER
 SERVICE ADVISOR
 TECHNICIAN
 PARTS DEPARTMENT
 WARRANTY PERSONNEL

BULLETIN NUMBER:
CB23-J-001B
ISSUE DATE:
MAY 2023
GROUP:
ENGINE

VOLUNTARY EMISSIONS RECALL
MASS AIR FLOW (MAF) SENSOR REPLACEMENT (V2207)
AFFECTED VEHICLES
•

2020 - 2023MY N-Series Vehicles Produced from 8/26/2020
through 7/31/2022 and Equipped with 6.6L (L8T) Gasoline Engines

This bulletin supersedes previous campaign bulletin CB23-J-001A. This bulletin is
being updated to revise the service procedure. Please discard previous campaign
bulletin CB23-J-001A.
INFORMATION
CONDITION
General Motors LLC, the manufacturer of the engine in your vehicle, has determined that
certain 2020 - 2023MY N-Series vehicles produced from 8/26/2020 through 7/31/2022
and equipped with 6.6L (L8T) gasoline engines may experience water intrusion into the
Mass Air Flow (MAF) sensor connector. If water intrudes into this connection, you may
experience engine performance issues as well as setting the Check Engine Malfunction
Indicator Lamp (MIL).
CORRECTION
Dealers will replace the MAF sensor and apply additional sealing tape to the MAF
connection for waterproof protection on affected vehicles. This service will be provided
free of charge.
IMPORTANT: California dealers must issue a “Proof of Correction Certificate” to
owners of the affected vehicles after completing the work specified below. Advise
the Isuzu owners to keep the Certificate, as the California Department of Motor
Vehicles may ask for proof of this campaign completion before permitting renewal
of the vehicles’ registration.
IMPORTANT: Dealers must fill out every field on the Proof of Correction Certificate.
VEHICLES INVOLVED
Involved are certain 2020 - 2023MY N-Series vehicles produced from 8/26/2020 through
7/31/2022 and equipped with 6.6L (L8T) gasoline engines.
NOTE: Dealers are to confirm vehicle eligibility prior to beginning repairs by using the
Isuzu Vehicle Information 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.
PARTS INFORMATION
Parts orders may be placed with American Isuzu Parts Distribution Network (AIPDN).
Please refer to your “involved vehicles listing” before ordering parts. Normal (nonemergency) orders should be placed on a Stock Order. In an emergency situation, parts
should be ordered on a VOR (Vehicle Off Road) Order.
Part Number

Description

QTY

8-12714-453-0

Air Flow Cont. Sensor (MAF)

1

Tesa® Tape 51006 or
Tesa® Tape 51036

N.P.N.

Up to 100cm

SERVICE PROCEDURE
1. Turn off the ignition.
2. Remove the mass air flow (MAF) sensor/intake air temperature (IAT) sensor
bolts (1) and remove the MAF sensor from the intake duct. See Figure 1.

Figure 1
3. If the vehicle was produced on or after 01/03/2022, it will have Tesa tape already
wrapped around the MAF sensor connection. Un-wrap the existing Tesa tape
and discard it. For all other vehicles, continue to Step 4.
4. Disconnect the harness to the MAF sensor/IAT sensor (2). See Figure 1.
5. Connect the harness to the NEW MAF sensor/IAT sensor prior to inserting it into
the air intake duct. See Figure 2.

2

Figure 2
6. Using Tesa® tape 51006 (or Tesa® tape 51036) align the tape to the edge of the
sensor shown by the dotted lines. See Figure 3.

Figure 3
7. Start at the sensor edge and wrap three times. Ensure that the tape is securely
attached to all surfaces, including the recesses shown circled in the photo. See
Figure 4.

3

Figure 4
8. Press down on the tape to ensure all gaps are closed and sealed. See Figure 5.

Figure 5
9. Continue wrapping around the harness bend. See Figure 6.

Figure 6

4

10. Continue wrapping the harness, overlapping the previous wrap by half, and
ending 100mm from the outside edge of the harness bend. See Figure 7.

Figure 7
IMPORTANT: Inspect for contamination or damage. There should be no solvents
or lubricants adhering to the detecting section of the sensor.
11. Install the MAF sensor/IAT sensor (2) and bolts (1) into the intake air duct. See
Figure 1. Tighten the bolts to 1.5 N·m (13 lb·in).
12. Proceed to Applying the Campaign Label.
APPLYING THE CAMPAIGN LABEL
13. Using a ball-point pen, fill in a campaign label (Part No. 2-90028-700-0) with
Campaign Number V2207, Isuzu dealer code, and repair date.
14. 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.
Refer to information bulletin IB19-X-004 Proof of Correction Certificate For
Emissions Campaigns.

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Example, Proof of Correction Certificate

CAMPAIGN CLAIM INFORMATION
Refer to the Isuzu ICS Claims Processing Manual for details on Campaign Claim
Submission. Submit only one claim as indicated below.
LABOR
CODE

DESCRIPTION

LABOR
HOURS

NET
ITEM

V2207

MAF Sensor Replacement and Harness Wrap

0.4

$2.00

DEALER RESPONSIBILITY
All vehicles in dealers' possession and subject to this recall must be held and repaired
per the service procedure of this emissions 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.
OWNER NOTIFICATION
Sample recall letters that are being or have been sent to owners of affected vehicles
already retailed in the United States and Canada are attached below.

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[SAMPLE OWNER LETTER – US]

VOLUNTARY EMISSIONS RECALL
Emissions Campaign V2207

This notice applies to your vehicle,

APRIL 2023
Dear Customer:
This notice is sent to inform you that Isuzu Commercial Truck of America, Inc. is conducting a
voluntary emissions recall that includes your model year N-Series gasoline truck.
WHAT IS THE CONDITION?
General Motors LLC, the manufacturer of the engine in your vehicle, has determined that certain
2020 - 2023MY N-Series vehicles produced from 8/26/2020 through 7/31/2022 and equipped with
6.6L (L8T) gasoline engines may experience water intrusion into the Mass Air Flow (MAF) sensor
connector. If water intrudes into this connection, you may experience engine performance issues
as well as setting the Check Engine Malfunction Indicator Lamp (MIL).
WHAT WE WILL DO
Your Isuzu dealer will replace the MAF sensor and apply additional sealing tape to the MAF
connection for waterproof protection on your vehicle. This service will be provided free of
charge.
WHAT YOU SHOULD DO
We recommend you contact your Isuzu dealer to schedule an appointment to bring your vehicle in
to have this service performed. Present this Owner Notification Letter at the time of your
appointment or refer to voluntary emissions recall campaign bulletin CB23-J-001. We estimate
this service may take approximately 24 minutes to perform. Additional time may be necessary
depending on how appointments are scheduled and processed at your dealership. To locate your
nearest dealer, please use the dealer locator on our website at www.isuzucv.com. If you have
questions or concerns, please contact our Customer Relations Department at 1-866-441-9638.
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.
We regret any inconvenience this action may cause you.
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 attached "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.

7

[SAMPLE OWNER LETTER – CANADA]

VOLUNTARY EMISSIONS RECALL
Emissions Campaign V2207

This notice applies to your vehicle,
model year ISUZU N-SERIES

MAY 2023
Dear Customer,
This notice is sent to you in accordance with the requirements of the Canadian Environmental
Protection Act, 1999 (CEPA 1999).
WHAT IS THE CONDITION?
General Motors LLC, the manufacturer of the engine in your vehicle, has determined that certain
2020 - 2023MY N-Series vehicles produced from 8/26/2020 through 7/31/2022 and equipped with
6.6L (L8T) gasoline engines may experience water intrusion into the Mass Air Flow (MAF) sensor
connector. If water intrudes into this connection, you may experience engine performance issues
as well as setting the Check Engine Malfunction Indicator Lamp (MIL).
When a MAF sensor fails, some degree of emissions increase may occur as the combustion airfuel ratio may not be controlled as accurately as intended.
WHAT WE WILL DO
Your Isuzu dealer will replace the MAF sensor and apply additional sealing tape to the MAF
connection for waterproof protection on your vehicle. This service will be provided free of
charge.
WHAT YOU SHOULD DO
We recommend you contact your Isuzu dealer to schedule an appointment to bring your vehicle in
to have this service performed. Present this Owner Notification Letter at the time of your
appointment or refer to voluntary emissions recall campaign bulletin CB23-J-001A. We estimate
this service may take approximately 24 minutes to perform. Additional time may be necessary
depending on how appointments are scheduled and processed at your dealership. To locate your
nearest dealer please use the dealer locator on our website at www.isuzutruck.ca. If you have
questions or concerns that your Isuzu dealer is unable to answer, please contact our Customer
Relations Department at 1-866-441-9638.
We regret any inconvenience this action may cause you.
Sincerely,
Isuzu Commercial Truck of Canada, Inc.
Important: If you have sold or traded your Isuzu vehicle, please enter the owner's name and address, if known, on the attached "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.

8