NHTSA ID Number: 11029138
Manufacturer Communication Number: SC357_TSB
TSB/Document Date: 2026-03-02
Summary
TECHNICAL SERVICE BULLETIN: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: ECU EMISSIONS SOFTWARE LOGIC IMPROVEMENT (SC357) - This bulletin provides information to upgrade the Engine Control Unit (ECU) system software to improve the emissions-related logic on 2020-2025MY Telluride (ON) vehicles equipped with the Lambda II 3.8L GDI engine, produced from January 9, 2019 through October 27, 2025. The subject vehicles may have engine calibrations that were not optimized for emissions standards under certain specific conditions, which may cause the vehicle to release air pollutants which exceed Federal and California standards.
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TSB/Document ID: SC357_TSB
Replacement Service Bulletin Number:
MFR Communication Date: 2026-02-16
MFR Internal Campaign ID/Software Version: SC357
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
GROUP
MODEL
Voluntary Emissions
2020-2025MY
Service Campaign
Telluride (ON)
NUMBER
DATE
SC357
February 2026
VOLUNTARY EMISSIONS SERVICE CAMPAIGN
SUBJECT:
ECU EMISSIONS SOFTWARE
LOGIC IMPROVEMENT (SC357)
This bulletin provides information to upgrade the Engine Control Unit (ECU) system software to improve the
emissions-related logic on 2020-2025MY Telluride (ON) vehicles equipped with the Lambda II 3.8L GDI
engine, produced from January 9, 2019 through October 27, 2025. The subject vehicles may have engine
calibrations that were not optimized for emissions standards under certain specific conditions, which may
cause the vehicle to release air pollutants which exceed Federal and California standards. Follow the
procedure outlined in this publication to upgrade the ECU software on the applicable vehicle. Before
conducting the procedure, verify that the vehicle is included in the list of affected VINs. Refer to SST081 for
software upgrade instructions using Kia
Diagnostic System (KDS) tablet and VCI-II and confirm the Upgrade
Event Number/Name, ROM ID Information, and Manual Mode passwords (if applicable) on the applicable
vehicle.
NOTICE
Repair status for a VIN is provided on KDealer+ (Service → Warranty Coverage → Warranty
Coverage Inquiry → Campaign Information). Not completed Recall / Service Action reports are
available on KDealer+ (Consumer Affairs → Not Completed Recall → Recall VIN → Select Report),
which includes a list of affected vehicles.
A printed copy is for reference only; publication information can be updated at any time.
Always refer to KGIS for the latest information. After logging in kdealer.com, the newest technical
publications are listed in ‘Service Releases’ and has the latest service information that has been released.
Kia America, Inc. Internal Use Only
Page 2 of 7
SUBJECT:
ECU EMISSIONS SOFTWARE LOGIC IMPROVEMENT (SC357)
Refer to TSB SST081 for instructions to upgrade the ‘PDC’ system:
To correct this condition, the specified system module should be reprogrammed using KDS
as described in this bulletin in ‘Auto Mode’.
Upgrade Event Name
894.ON/ON PE Lambda 3.8 Emission Logic Improvement
Connect the negative (-) terminal to the battery as shown below.
NOTICE
Before attempting an ECU upgrade on any Kia model, make sure to first determine whether the
applicable model is equipped with an immobilizer
security system. Failure to follow proper
procedures may cause the PCM to become inoperative after the upgrade and any claims associated
with this repair may be subject to chargeback.
Printed document copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: SC357 Telluride (ON) February 2026
Kia America, Inc. Internal Use Only
Page 3 of 7
SUBJECT:
ECU EMISSIONS SOFTWARE LOGIC IMPROVEMENT (SC357)
ROM ID Information Table:
Upgrade Event #894
IMPORTANT
It is recommended to ALWAYS check the Electronic Parts Catalog (EPC) to locate the ECU Part
Number respective to Auto/Manual Mode ROM IDs. DO NOT reference the parts label affixed to
the ECU.
Model
System
IMMO
ECU P/No.
ROM ID
Previous
New
ONLN8GMS_J0A
ONLN8GMS_J0B
Yes
39122 3LNN0
ONLN8GMS_J0C
ONLN8GMS_K3A
ONLN8GMS_K0A
ON
20MY
ONLN8GMS_K0B
ECU
ONLN8GSS_J0A
ONLN8GSS_J0B
No
39132 3LNN0
ONLN8GSS_J0C
ONLN8GSS_K3A
ONLN8GSS_K0A
ONLN8GSS_K0B
ONMN8GMS_K0A
ONMN8GMS_K0B
Yes
39122 3LNN1
ONMN8GMS_K0C
ONMN8GMS_K0D
ONMN8GMS_N3A
ONMN8GMS_K0E
ON
21MY
ONMN8GMS_N2A
ECU
ONMN8GSS_K0A
ONMN8GSS_K0B
No
39132 3LNN1
ONMN8GSS_K0C
ONMN8GSS_K0D
ONMN8GSS_N3A
ONMN8GSS_K0E
ONMN8GSS_N2A
ON
22MY
Yes
39122 3LNN2
No
39132 3LNN2
ONNN8GMS_S1A
ONNN8GMS_S1B
ONNN8GMS_S3A
ECU
ONNN8GSS_S1A
ONNN8GSS_S1B
ONNN8GSS_S3A
Continued on page 4.
Printed document copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: SC357 Telluride (ON) February 2026
Kia America, Inc. Internal Use Only
Page 4 of 7
SUBJECT:
Model
ECU EMISSIONS SOFTWARE LOGIC IMPROVEMENT (SC357)
System
IMMO
ECU P/No.
ROM ID
Previous
New
OPPNEM___U0A
Yes
ON
23MY
39102 3LNN5
OPPNEM___U0B
OPPNEM___U1A
OPPNEM___U0C
ECU
OPPNES___U0A
No
39102 3LNN6
OPPNES___U0B
OPPNES___U1A
OPPNES___U0C
ON
24MY
ON
25MY
Yes
39102 3LNN7
No
39102 3LNN8
Yes
39102 3LNN3
No
39102 3LNN4
OPQNEM___U0D
OPQNEM___U0E
OPQNEM___U1A
ECU
OPQNES___U0D
OPQNES___U0E
OPRNEM___U0A
OPRNEM___U0B
OPQNES___U1A
OPRNEM___U1A
ECU
OPRNES___U0A
OPRNES___U0B
OPRNES___U1A
To verify the vehicle is affected, be sure to check the Calibration Identification of the vehicle's ECM ROM ID
and reference the Information Table as necessary.
Printed document copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: SC357 Telluride (ON) February 2026
Kia America, Inc. Internal Use Only
Page 5 of 7
ECU EMISSIONS SOFTWARE LOGIC IMPROVEMENT (SC357)
SUBJECT:
Software Information:
The required software must be installed by selecting
the ‘Auto Mode’ ECU Upgrade option.
Note: In some case, the ‘Manual Mode’ installation
option may be required ONLY if the ‘Auto Mode’
function fails or is otherwise noted above.
NOTICE
If the automatic upgrade fails, turn the ignition ‘OFF’ for about 10 seconds then place it back in the
‘ON’ position to reset the control unit BEFORE performing the manual upgrade.
‘Manual Mode’ passwords.
Menu
Password
ON Lambda 3.8 20MY +IMMO/SMK : 39122-3LNN0
2230
ON Lambda 3.8 20MY -IMMO : 39132-3LNN0
5215
ON Lambda 3.8 21MY +IMMO/SMK : 39122-3LNN1
4522
ON Lambda 3.8 21MY -IMMO : 39132-3LNN1
0388
ON Lambda 3.8 22MY +IMMO/SMK : 39122-3LNN2
2919
ON Lambda 3.8 22MY -IMMO : 39132-3LNN2
3232
ON PE Lambda 3.8 23MY +IMMO/SMK : 39102-3LNN5
5388
ON PE Lambda 3.8 23MY -IMMO : 39102-3LNN6
9977
ON PE Lambda 3.8 24MY +IMMO/SMK : 39102-3LNN7
2799
ON PE Lambda 3.8 24MY -IMMO : 39102-3LNN8
8676
ON PE Lambda 3.8 25MY +IMMO/SMK : 39102-3LNN3
9652
ON PE Lambda 3.8 25MY -IMMO : 39102-3LNN4
4429
UPGRADE EVENT:
Select the applicable ‘ECU’ system module and the
Event Group.
•
894.ON/ON PE Lambda 3.8 Emission Logic
Improvement
Verify the affected vehicle Calibration Identification of
the applicable ECU ROM ID and reference the
Information Table on page 3 as necessary.
Printed document copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: SC357 Telluride (ON) February 2026
Kia America, Inc. Internal Use Only
Page 6 of 7
SUBJECT:
ECU EMISSIONS SOFTWARE LOGIC IMPROVEMENT (SC357)
ATTENTION: THE PROOF OF CORRECTION CARD AND CAMPAIGN COMPLETION LABEL ARE
RESTRICTED ONLY TO DEALERS IN THE FOLLOWING STATES:
California, Connecticut, Delaware, Massachusetts, Maine, Maryland, New Jersey, New York, Oregon,
Pennsylvania, Rhode Island, Vermont, and Washington. See Parts Information below to order the Proof of
Correction Card and Campaign Completion Label from the PDC.
VEHICLE EMISSION RECALL - PROOF OF CORRECTION CARD
A Vehicle Emission Recall - Proof of Correction card must be filled out for all vehicles registered in California,
Connecticut, Delaware, Massachusetts, Maine, Maryland, New Jersey, New York, Oregon, Pennsylvania,
Rhode Island, Vermont, and Washington. Residents of these states, who own an affected vehicle, will be
required to possess a Vehicle Emission Recall - Proof of Correction card as evidence of voluntary service
campaign completion, when they apply for vehicle registration renewal.
WHAT TO DO WITH THE CARD:
The Vehicle Emission Recall - Proof of Correction card must be completed by the Dealership's Service Manager
using a permanent ink pen. A fine point pen is recommended. When filling in the information, copy the
information directly from the vehicle, not the repair order. ALL INFORMATION MUST BE PRINTED AND NEAT.
NOTE: DO NOT COMPLETE THE CARD UNLESS THE SERVICE CAMPAIGN WORK IS COMPLETED.
The copy of the card shown below indicates the areas to be filled in. Each area must be filled in. The completed
card should be given to the owner of the vehicle upon completion of the Campaign and placement of the
Campaign Completion Label outlined below…
FILLING OUT AND APPLYING THE CAMPAIGN COMPLETION LABEL (CA and S.177 STATES ONLY):
The dealer must fill in the Dealer Code and Date information fields on the Campaign Completion Label.
Once complete, affix the campaign completion label under the hood of the vehicle, as shown below.
CA and S.177 States Only: Apply SC357 Campaign
SC357
Completion Label onto the body in the area next to
Dealer Code:
the shock tower, as shown.
Date:
NOTE: Be sure to clean the mounting surface to
ensure proper label adhesion.
Printed document copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: SC357 Telluride (ON) February 2026
Kia America, Inc. Internal Use Only
UT160 SC340
Page 7 of 7
ECU EMISSIONS SOFTWARE LOGIC IMPROVEMENT (SC357)
SUBJECT:
AFFECTED VEHICLE RANGE:
Model
Production Date Range
Telluride (ON)
January 8, 2019 to October 27, 2025
REQUIRED TOOL:
Tool Name
Part Number
Kia Diagnostic System
Figure
Comments
N/A
(KDS)
KDS + VCI
REQUIRED PART:
Part Name
Part Number
Figure
Qty.
Comments
UT161 SC357
1
N/A
UT160 SC357
1
N/A
Vehicle Emissions
Recall Proof of
Correction Card
Campaign
Completion Label
WARRANTY INFORMATION:
N Code: N99 C Code: C99
Claim
Type
R
Causal P/N
39122
3LNN0
Qty.
Repair
Labor Op
Op
Replacement
Description
Code
Time
P/N
(SC357)
0
ECU Software
Logic Improvement
250A63R0
0.3
M/H
N/A
Qty.
0
Note: Refer to Warranty Bulletin 2026-09 for claim submission procedures. For Substitute
Transportation policy, please refer to Service Policy and Procedures Manual (SPPM) 6.11 “Kia Substitute
Transportation”.
NOTICE
VIN inquiry data for this repair is provided for tracking purposes only. Kia retailers should reference
SC357 when accessing the KDealer+ system.
Printed document copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: SC357 Telluride (ON) February 2026
Kia America, Inc. Internal Use Only
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