EMISSION RECALL
NORTH AMERICA

NOx Sensor
FCA US LLC

Reference: 37D

_________________________________________________________
Remedy available for
2025-2026 (DD) RAM 3500 Cab Chassis
2025-2026 (DP) RAM 4500/5500 Cab Chassis

Template Version 1.0

Revision
0

Edition
June 2026

Detail
Initial Version.

SYMPTOM DESCRIPTION
The Engine Control Module (ECM) on about 9,392 of
the above vehicles may have a diagnostic calibration
set incorrectly which makes it unable to set certain
DTCs. In particular, these vehicles may be equipped
with an improperly functioning on-board emissionrelated diagnostic system, which prevents the setting
of DTC U05A8-SE5989, a DTC related to NOx sensor
monitoring.

SCOPE
This recall applies only to the above vehicles equipped
with a 6.7L engine (sales code ETN).
NOTE: Some vehicles above may have been
identified as not involved in this recall and therefore
have been excluded from this recall.
IMPORTANT: Some of the involved vehicles may be
in dealer new vehicle inventory. Dealers should
complete this campaign service on these vehicles
before retail delivery. Dealers should also perform this
repair on vehicles in used vehicle inventory and those
vehicles in for service. Involved vehicles can be
determined by using the VIP inquiry process.

REPAIR TO BE PERFORMED

Screen located on the Service tab. Claims paid will
be used by FCA to record recall service completions
and provide dealer payments.
Use the following labor operation numbers and time
allowances:
Labor Description
Module, Engine Control
(ECM) - Inspect Software
Level
Module, Engine Control
(ECM) - Inspect and
Reprogram

Number
18-37-D1-81

Hrs
0.2

18-37-D1-82

0.2

NOTE: See the Warranty Administration Manual,
Recall Claim Processing Section, for complete
recall claim processing instructions.
NOTE: When multiple campaign repairs are
performed during the same visit, general
operations will be considered for claim overlap.
Upon claim submission, if overlap is identified by
the warranty system, an LG4 message code will
be shown, and an adjustment is required to the
labor time before the claim will be accepted.
Reference Warranty Bulletin D-26-12 for further
details on claim processing instructions.

Update the ECM software.

ALTERNATE TRANSPORTATION
Dealers should proactively minimize customer
inconvenience while the recall repair is being
performed.
Reference the Goodwill Alternate
Transportation Guidelines warranty bulletin link within
Recall Central on DealerCONNECT for options to
support the customer while their vehicle is in service.

COMPLETION REPORTING / REIMBURSEMENT

For Mobile Service Reimbursement, dealer to include
standard dealer entry and mark-up for parts, standard
dealer entry and labor rate for service, as well as the
special services code for mobile allowance. The
special services LOP will only be paid once per VIN
and may NOT be used in coordination with any
Alternate Transportation claims.
For additional details, reference the Mobile Service
Warranty Bulletin - for convenience, a copy has been
linked within Recall Central on DealerCONNECT.

Claims for vehicles that have been serviced must be
submitted on the DealerCONNECT Claim Entry
Strictly respect STELLANTIS Group safety, cleanliness, and environmental instructions for any vehicle service.
Document exclusively reserved for dealer information. Internal distribution to be ensured by dealer.
Reproduction forbidden without the written agreement of STELLANTIS Group. (C) 2026 STELLANTIS Group. All Rights Reserved

(djt)

1/4

EMISSION RECALL
NORTH AMERICA

NOx Sensor
FCA US LLC

Reference: 37D

_________________________________________________________
PARTS INFORMATION
Part No.
04275086AE

Qty.
1

Part Name
Authorized Modification Label

PARTS RETURN
No parts required for this campaign.

SPECIAL TOOLS
Number
NPN
NPN
NPN

Description
wiTECH MicroPod II / MDP
Laptop Computer
wiTECH Software

DEALER NOTIFICATION
To view this notification on DealerCONNECT, select
“Global Recall System” on the Service tab, then click
on the description of this notification.

OWNER NOTIFICATION / SERVICE SCHEDULING
All involved vehicle owners known to FCA are being
notified of the service requirement by first class mail.
They are requested to schedule appointments for this
service with their dealers. A generic copy of the owner
letter is attached.
Dealers are encouraged to consider alternative
scheduling and servicing approaches for this recall.
This repair does not require hoists or other full service
facility special equipment and is a Chrysler Mobile
Service approved repair.

VEHICLE LISTS, GLOBAL RECALL SYSTEM, VIP
AND DEALER FOLLOW UP
All involved vehicles have been entered into the
DealerCONNECT Global Recall System (GRS) and
Vehicle Information Plus (VIP) for dealer inquiry as
needed.
GRS provides involved dealers with an updated VIN
list of their incomplete vehicles. The owner’s name,
address and phone number are listed if known.
Completed vehicles are removed from GRS within
several days of repair claim submission.
To use this system, click on the “Service” tab and then
click on “Global Recall System.” Your dealer’s VIN
list for each recall displayed can be sorted by: those
vehicles that were unsold at recall launch, those with
a phone number, city, zip code, or VIN sequence.
Dealers must perform this repair on all unsold
vehicles before retail delivery. Dealers should also
use the VIN list to follow up with all owners to schedule
appointments for this repair.
Recall VIN lists may contain confidential, restricted
owner name and address information that was
obtained from the Department of Motor Vehicles of
various states. Use of this information is permitted for
this recall only and is strictly prohibited from all other
use.

ADDITIONAL INFORMATION
If you have any questions or need assistance in
completing this action, please contact your Service
and Parts District Manager.
Customer Services / Field Operations
FCA US LLC.

Strictly respect STELLANTIS Group safety, cleanliness, and environmental instructions for any vehicle service.
Document exclusively reserved for dealer information. Internal distribution to be ensured by dealer.
Reproduction forbidden without the written agreement of STELLANTIS Group. (C) 2026 STELLANTIS Group. All Rights Reserved

(djt)

2/4

EMISSION RECALL
NORTH AMERICA

NOx Sensor
Reference: 37D

FCA US LLC

_________________________________________________________
SERVICE PROCEDURE
A. Engine Control Module (ECM)
NOTE: The wiTECH scan tool must be used to perform this recall. If the reprogramming flash for the
ECM is aborted or interrupted, repeat the procedure.
1. Open the hood. Install a battery charger and verify that the charging rate provides 13.0 to 13.5 volts. Do
not allow the charger to time out during the flash process. Set the battery charger timer (if so equipped) to
continuous charge.
NOTE: Use an accurate stand-alone voltmeter. The battery charger volt meter may not be sufficiently
accurate. Voltages outside of the specified range will cause an unsuccessful flash. If voltage reading
is too high, apply an electrical load by activating the park or headlamps and/or HVAC blower motor to
lower the voltage.
2. Connect the wiTECH MDP to the vehicle data link connector.
3. Place the ignition in the “RUN” position.
4. Open the wiTECH 2.0 website.
5. Enter your “User id” and “Password” and your “Dealer Code”, then select “Sign In” at the bottom of the
screen. Click “Accept”.
6. From the “Vehicle Selection” screen, select the vehicle to be updated.
7. From the “Action Items” screen, select the “Topology” tab.

NOTE: The ECM must be at the latest software calibration level after completing this recall.

8. From the “Topology” tab, select the “Engine Control Module (ECM)” module icon.
9. From the “Flash” tab, compare the “Current Electronic Control Unit (ECU) Part Number” with the “New
ECU Part Number” listed.
➢

If the “Current ECU part Number” is the same as the “New Part Number”, proceed to Step 15.

➢

If the “Current ECU part Number” is NOT the same as the “New Part Number”, continue with Step 10.

Strictly respect STELLANTIS Group safety, cleanliness, and environmental instructions for any vehicle service.
Document exclusively reserved for dealer information. Internal distribution to be ensured by dealer.
Reproduction forbidden without the written agreement of STELLANTIS Group. (C) 2026 STELLANTIS Group. All Rights Reserved

(djt)

3/4

EMISSION RECALL
NORTH AMERICA

NOx Sensor
FCA US LLC

Reference: 37D

_________________________________________________________
10.

From the ECM tab, select the ECM flash part number. Read the flash special instructions page. Select “OK”
to continue.

11.

From the flash ECU agreement page, agree to terms by checking the box.

12.

Select “Flash ECU” and then follow the wiTECH screen instructions to complete the flash.

13.

Confirm the software is at the latest available calibration level.

14.

Click “View DTCs”, select “Clear All DTCs”, click “Continue” and then click “Close”.

15. Place the ignition in the “OFF” position and then remove the wiTECH MDP device from the vehicle.
16. Remove the battery charger from the vehicle.

B. Install the Authorized Modifications Label:

ECM SOFTWARE UPDATE COMPLETED
RECALL 37D

Figure 1 – Authorized Modifications Label
Type or print (with a ballpoint pen) the necessary information shown in Figure 1 onto the Authorized
Modifications Label. Then attach the label near the VECI label.

C. Complete Proof of Correction Form for California Residents:
This recall is subject to the State of California Registration Renewal/Emissions Recall Enforcement
Program. Complete a Vehicle Emission Recall Proof of Correction Form (Form No. 81-016-1053) and
supply it to vehicle owners residing in the state of California for proof that this recall has been
performed when they renew the vehicle registration.

Strictly respect STELLANTIS Group safety, cleanliness, and environmental instructions for any vehicle service.
Document exclusively reserved for dealer information. Internal distribution to be ensured by dealer.
Reproduction forbidden without the written agreement of STELLANTIS Group. (C) 2026 STELLANTIS Group. All Rights Reserved

(djt)

4/4

This notice applies to your vehicle,

[Model Year and Model]

IMPORTANT EMISSIONS RECALL

VIN XXXXXXXXXXXXXXXXX

NOx Sensor

37D
Dear [Name],

LOGO
VEHICLE PICTURE

YOUR SCHEDULING OPTIONS
1. RECOMMENDED OPTION
Call your authorized Chrysler /
Jeep®
/
Dodge
/
RAM
BusinessLink / Dealership.
2. Call the FCA Recall Assistance
Center at 1-800-853-1403. An
agent can confirm part availability
and help schedule an appointment.
3. Visit recalls.mopar.com, scan the
QR code below, or download the
Mopar Owner’s Companion App.

QR Code

Get access to recall notifications, locate
your nearest dealer, and more through
this website or Mopar Owner’s
Companion App. You will be asked to
provide your Vehicle Identification
Number (VIN) to protect and verify
your identity. The last eight characters
of your VIN are provided above.
DEALERSHIP INSTRUCTIONS
Please reference Emissions Recall
37D

FCA US LLC, has determined that certain [2025-2026 (DD) RAM 3500 Cab Chassis and 2025-2026
(DP) RAM 4500/5500 Cab Chassis] vehicles equipped with 6.7L engine may be equipped with an
improperly functioning on-board emission-related diagnostic system.
WHY DOES MY VEHICLE NEED REPAIRS?
The Engine Control Module (ECM) on your vehicle [1] may have a diagnostic calibration set
incorrectly which makes it unable to set certain diagnostic trouble codes. This could result in the
system failing to detect high NOx emissions.
HOW DO I RESOLVE THIS IMPORTANT EMISSIONS ISSUE?
FCA US LLC will repair your vehicle free of charge (parts and labor). To do this, your dealer
will reprogram the ECM. The estimated repair time is 15 minutes. In addition, your dealer
will require your vehicle for proper check-in, preparation, and check-out during your visit,
which require more time. Your time is important to us, so we recommend that you schedule a
service appointment to minimize your inconvenience. Ask your dealer for alternate
transportation options while your vehicle is in service. Please bring this letter with you to your
dealership.
TO SCHEDULE YOUR FREE REPAIR,
CALL YOUR CHRYSLER, JEEP®, DODGE OR RAM DEALER TODAY
CALIFORNIA RESIDENTS
The State of California requires the completion of this emission recall repair prior to vehicle
registration renewal. Your dealer will provide you with a Vehicle Emission Recall Proof of
Correction Form after the Emission Recall service is performed. Be sure to save this form since
the California Department of Motor Vehicles may require that you supply it as proof that the
Emission Recall has been performed.
In order to ensure your full protection under the emissions warranty provisions, it is
recommended that you have your vehicle serviced as soon as possible. Failure to do so could
be determined as lack of proper maintenance of your vehicle.
WHAT IF I ALREADY PAID TO HAVE THIS REPAIR COMPLETED?
If you have already experienced this specific condition and have paid to have it repaired, you
may visit www.fcarecallreimbursement.com to submit your reimbursement request online. [2]
Once we receive and verify the required documents, reimbursement will be sent to you within
60 days. If you have had previous repairs performed and/or already received reimbursement,
you may still need to have the recall repair performed.
We apologize for any inconvenience, but are sincerely concerned about your satisfaction. Thank
you for your attention to this important matter.
Customer Assistance/Field Operations
FCA US LLC

Mr. Mrs. Customer
1234 Main Street
Hometown, MI 48371

[1] If you no longer own this vehicle, please help us update our records. Call the FCA Recall Assistance Center at 1-800-853-1403 to update your information.
[2] You can also mail in your original receipts and proof of payment to the following address for reimbursement consideration: FCA Customer Assistance, P.O. Box 21-8004,
Auburn Hills, MI 48321-8007, Attention: Recall Reimbursement.