NHTSA ID Number: 11029979
Manufacturer Communication Number: SC340_TSB_R4
TSB/Document Date: 2026-03-13
Summary
TECHNICAL SERVICE BULLETIN: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: THETA II 2.4L GDI EMISSION SECM LOGIC IMPROVEMENT (SC340 REV 4) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information to upgrade the Electronic Control Module ‘ECM’ system software for certain 2016-2022MY vehicles equipped with 2.4L Theta II engines listed in the table below. Kia
has become aware that certain 2016-2022MY vehicles equipped with 2.4L Theta II engines may have engine calibrations that were not optimized for emissions standards under certain specific conditions. These calibrations may cause the vehicle to release air pollutants which exceed Federal and California standards. These standards were established to protect your health and welfare from the dangers of air pollution.
GROUP
MODEL
Voluntary Emissions
2016-2022MY
Service Campaign
Multiple Models
NUMBER
DATE
SC340 (Rev 4, 03/05/2026)
November 2025
VOLUNTARY EMISSIONS SERVICE CAMPAIGN
SUBJECT:
THETA II 2.4L GDI EMISSIONS
ECM LOGIC IMPROVEMENT (SC340)
NOTICE
This bulletin has been revised to include additional information. New/revised sections of this
bulletin are indicated by a black bar in the margin area.
This bulletin provides information to upgrade the Electronic Control Module ‘ECM’ system software for certain
2016-2022MY vehicles equipped with 2.4L Theta II engines listed in the table below. Kia has become aware that
certain 2016-2022MY vehicles equipped with 2.4L Theta II engines may have engine calibrations that were not
optimized for emissions standards under certain specific conditions. These calibrations may cause the vehicle
to release air pollutants which exceed Federal and California standards. These standards were established to
protect your health and welfare from the dangers of air pollution. Follow the procedure outlined in this
publication to update the ‘ECM’ software with improve Diagnostic Trouble Code (DTC) judgement logic. 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.
Model Year
Model
Production Date Range
16-20MY
Optima (JF, JFa)
August 28, 2015 to June 23, 2020
18-20MY
Sorento (UMa)
March 31, 2017 to November 4, 2020
17-22MY
Sportage (QL)
December 10, 2015 to December 7, 2021
16-17MY
Sorento (UMa),
TBD Software Release
(Under Development
and will be released at different stages)
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.
This issue number is SC340.
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.
Page 2 of 25
THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340)
SUBJECT:
Refer to TSB SST081 for instructions to upgrade the ‘ECM’ 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
876.UMa PE Theta 2.4 Emission Logic Improvement (19MY)
877.UMa PE Theta 2.4 Emission Logic Improvement (20MY)
878.JFa PE Theta 2.4 Emission Logic Improvement (19~20MY)
879.QL/QL PE Theta 2.4 Emission Logic Improvement (19~21MY)
914.QL/QL PE Theta 2.4 Emission Logic Improvement (22MY)
889.UMa Theta 2.4 Emission Logic improvement (18MY)
890.JF/JFa Theta 2.4 Emission Logic improvement (18MY)
891.QL Theta 2.4 Emission Logic improvement (18MY)
920. JF/JFa Theta 2.4 Emission Logic Improvement (16~17MY)
925. QL Theta 2.4 Emission Logic Improvement (17MY)
NOTICE
•
Confirm a fully charged battery (12.3 volts or higher is necessary) is used or utilize or fully charged jump
starter box connected to the battery.
•
Ensure the KDS GDS is sufficiently charged at 60% or higher to reflash.
•
All ECU upgrades must be performed with the ignition set to the ‘ON’ position unless otherwise stated.
•
Damaged VCI II units should not be used and promptly replaced.
•
Be careful not to disconnect the VCI-II connected to the vehicle during the ECU upgrade procedure.
•
DO NOT start the engine during ECU upgrade.
•
DO NOT turn the ignition key ‘OFF’ or interrupt the power supply during ECU upgrade.
•
When the ECU upgrade is completed, turn the ignition ‘OFF’ and wait 10 seconds before starting the
engine.
•
ONLY use approved ECU upgrade software designated for the correct application.
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: SC340 (Rev 4) Multiple Models November 2025
Page 3 of 25
SUBJECT:
THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340)
ROM ID Information Table:
Upgrade Event #889 Sorento (UMa)
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
UMAINC4ERA6A
UMAINC4ERA7A
UMAINC4ERA7B
UMAINC4ERD5A
39100 2GGF8
UMAINC4ERD5B
UMAINC4ERD5K
UMAINC4ERDXA
UMAINC4ERD5M
UMAINC4ERD5O
UMAINC4ERD5Q
UMAINC4ERD5S
Yes
UMAINC4ERA6A
UMAINC4ERA7A
UMAINC4ERA7B
UMAINC4ERD5A
39100 2GGH8
UMAINC4ERD5B
UMAINC4ERD5L
UMAINC4ERDXB
UMAINC4ERD5N
UMAINC4ERD5P
Sorento
(UMa)
18MY
UMAINC4ERD5R
ECM
UMAINC4ERD5T
(ULEV)
UMAINC4EMA6A
UMAINC4EMA7A
UMAINC4EMA7B
UMAINC4EMD5A
39100 2GGF3
UMAINC4EMD5B
UMAINC4EMD5K
UMAINC4EMDXA
UMAINC4EMD5M
UMAINC4EMD5O
UMAINC4EMD5Q
UMAINC4EMD5S
No
UMAINC4EMA6A
UMAINC4EMA7A
UMAINC4EMA7B
UMAINC4EMD5A
39100 2GGH3
UMAINC4EMD5B
UMAINC4EMD5L
UMAINC4EMDXB
UMAINC4EMD5N
UMAINC4EMD5P
UMAINC4EMD5R
UMAINC4EMD5T
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: SC340 (Rev 4) Multiple Models November 2025
Page 4 of 25
SUBJECT:
THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340)
Upgrade Event #876 Sorento (UMa)
Model
System
IMMO
ECU P/No.
ROM ID
Previous
New
UPAJNC4ERE1A
UPAJNC4ERE1B
UPAJNC4ERE1C
39171 2GMN0
UPAJNC4ERE1D
UPAJNC4ERG1A
UPAJNC4ERGXA
UPAJNC4ERG1B
UPAJNC4ERG1C
UPAJNC4ERG1D
Yes
UPAJNC4ERE1A
UPAJNC4ERE1B
UPAJNC4ERE1C
39171 2GMN1
UPAJNC4ERE1D
UPAJNC4ERG1K
UPAJNC4ERGXB
UPAJNC4ERG1L
UPAJNC4ERG1M
Sorento
(UMa)
19MY
UPAJNC4ERG1N
ECM
(ULEV)
UPAJNC4EME1A
UPAJNC4EME1B
UPAJNC4EME1C
39173 2GMA0
UPAJNC4EME1D
UPAJNC4EMG1A
UPAJNC4EMGXA
UPAJNC4EMG1B
UPAJNC4EMG1C
UPAJNC4EMG1D
No
UPAJNC4EME1A
UPAJNC4EME1B
UPAJNC4EME1C
39173 2GMA1
UPAJNC4EME1D
UPAJNC4EMG1K
UPAJNC4EMG1L
UPAJNC4EMG1M
UPAJNC4EMG1N
Continued on page 5…
Printed document copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: SC340 (Rev 4) Multiple Models November 2025
UPAJNC4EMGXB
Page 5 of 25
SUBJECT:
THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340)
Upgrade Event #877 Sorento (UMa)
Model
System
IMMO
ECU P/No.
ROM ID
Previous
New
UPAKNC4ERG1A
UPAKNC4ERG1B
Yes
39171 2GMN2
39171 2GMN3
UPAKNC4ERG3A
UPAKNC4ERG3B
UPAKNC4ERGXA
UPAKNC4ERG3C
UPAKNC4ERG3D
Sorento
(UMa)
20MY
UPAKNC4ERG3E
ECM
(ULEV)
UPAKNC4EMG1A
UPAKNC4EMG1B
No
39173 2GMA2
39173 2GMA3
UPAKNC4EMG3A
UPAKNC4EMG3B
UPAKNC4EMGXA
UPAKNC4EMG3C
UPAKNC4EMG3D
UPAKNC4EMG3E
Printed document copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: SC340 (Rev 4) Multiple Models November 2025
Page 6 of 25
SUBJECT:
THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340)
Upgrade Event #890 Optima (JF/JFa)
Model
System
IMMO
ECU P/No.
ROM ID
Previous
New
JFAINC4ERDAA
JFAINC4ERDAB
JFAINC4ERD5A
Yes
39108 2GGC7
JFAINC4ERD5B
JFAINC4ERD5K
JFAINC4ERDXA
JFAINC4ERD5L
JFAINC4ERD5N
JFAINC4ERD5O
(ULEV)
JFAINC4EMDAA
JFAINC4EMDAB
JFAINC4EMD5A
No
39108 2GGC2
JFAINC4EMD5B
JFAINC4EMD5K
JFAINC4EMDXA
JFAINC4EMD5L
JFAINC4EMD5N
Optima
JFAINC4EMD5O
(JF,JFa)
JFAINS4ERDAA
18MY
JFAINS4ERDAB
JFAINS4ERD5A
Yes
39108 2GGD7
JFAINS4ERD5B
JFAINS4ERD5K
JFAINS4ERDXA
JFAINS4ERD5L
JFAINS4ERD5N
JFAINS4ERD5O
(SULEV)
JFAINS4EMDAA
JFAINS4EMDAB
JFAINS4EMD5A
No
39108 2GGD2
JFAINS4EMD5B
JFAINS4EMD5K
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: SC340_TSB_R4
Replacement Service Bulletin Number:
MFR Communication Date: 2026-03-06
MFR Internal Campaign ID/Software Version: SC340
Communication Type: Emissions
NHTSA Components: ENGINE
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
- [Notice] When you receive a used device, it may be a customer return resold by Amazon without inspection. You can exchange it for a new one through Amazon. As this situation is unavoidable, we sincerely apologize. For any issues, contacting us via Amazon's "Messages" is the best way. THINKSCAN 689BT Bidirectional Scan Tool Can Be Used Immediately After It is Turned On, Without Complicated Registration Process, Which is More Convenient & Quick.
- Full Bi-Directional Control & 3000+ Active Tests: Take control and test components like actuators, fuel injectors, relays, and cooling fans in real time. You’ll quickly see if the problem is in the part itself or the control module — saving you hours of guesswork and frustrating trial-and-error.
- Advanced ECU Coding Capabilities: Handle module matching and hidden feature activation with confidence. When you replace an ECU or want to customize settings, this obd2 scanner diagnostic bi directional tool gives you the professional-level capabilities you need without the dealership price tag.
- 34+ Useful Reset and Maintenance Functions: Complete everyday service tasks smoothly with a wide range of helpful reset and maintenance functions. Whether you’re keeping up with regular upkeep or tackling a specific job, this scanner makes maintenance simpler and less stressful for both DIYers and pros.
- Comprehensive Full System Diagnostics: Diagnose every major system — Engine, Transmission, ABS, SRS, TPMS, and more — all in one place. Finally stop wondering if you’re missing something important; get the full picture and clear codes with ease.
- Top Reasons to Choose the D7S OBD2 Scanner: XTOOL D7S car scan tool, an upgrade of XTOOL D7, offers comprehensive features for automotive technicians, workshops, and DIY enthusiasts 1. Upgraded Hardware: 2+64GB memory, rear camera, intuitive interface, foldable bracket 2. Complete Diagnostics: FCA
Autoauth, OE-level all system scan, 39+ maintenance services, 4K+ bidirectional, CANFD/DoIP protocol 3. Advanced Capabilities: ECU coding, PMI functions 4. Wide Compatibility: Support 10,000+ models, covering 99% vehicle brands 5. Multi-language: Available in 22+ languages, No IP Restrictions 6. 3-Year Updates: Save 300 bucks on software updates for the latest features and optimizations - 2026 Upgraded D7S Car Scanner Features: The newly 2026 D7S V2.0 scanner for car brings exciting features for advanced vehicle diagnostics and enhanced user experience 1. FCA AutoAuth: Now supports FCA SGW module for Chrysler, for Jeep, for Dodge (2018+), for Fiat (2017+), enabling faster vehicle communication without gateway restrictions 2. PMI (Offline ECU Programming): Allows for Ford, for Lincoln, and for Mazda ECU programming for new modules 3. Optimized Diagnostic Report 2.0: Personalized reports with logos and customer info for auto shops. Note: Compatibility varies by cars, please check before order
- Cost-effective ECU Coding Scan Tool for Specific Brands: Enhance your vehicle's performance with XTOOL D7S! This obd2 scanner all systems bidirectional offers advanced capabilities at an affordable price, supports online for BMW, for Benz and offline for BENZ, for MIT, along with PMI functions for Ford, for Mazda, and for Lincoln. Ideal for technicians and DIY enthusiasts, this automotive scanner diagnostic tool optimizes vehicle performance and enhances the driving experience. Note: Not for all cars and modules, please send car VIN to check the compatibility before purchase
- OE All System Diagnostic & 8 Pids Graphing: XTOOL D7S is a comprehensive all system bi directional obd2 scanner that delivers dealer-level diagnostics, completely controlling over your vehicle’s performance and health. This automotive scan tool can read and clear DTCs, view live data and ECU information, retrieve freeze frames, and perform active tests and full obd2 functions. This bi-directional scan tool can can identify your vehicle's make, model, and year information with just one click and show up to 8 PIDs live data with options for CSV viewing, playback, and recording for in-depth analysis. It is easy-to-use for both professionals and beginners, helping pinpoint issues efficiently
- 3 Years Software Update, Value for Money: With 3 years of software updates and 22+ languages(no IP restrictions), XTOOL D7S auto scanner code scanner ensures ongoing compatibility for the latest car models and improved diagnostic functions. This all system vehicle diagnostic scanner comes with a 30-day return policy and a 24-month repair for dependable performance. XTOOL are dedicated to your satisfaction, so enjoy seamless support and lifetime expert assistance. Should you encounter any issues or concerns, don’t hesitate to reach out XTOOL. D7S with newest update with 22 languages freely transfer without authorization, check details from setting-language or from XTOOL
- 【✅Compared to BOSSCOMM IF742, IF745 Offers Full-System Diagnostics】The BOSSCOMM IF745 car diagnostic scanner is an upgraded model of IF742. In addition to supporting all OBD2 Code Reader functions and 6 reset options (ABS/EPB/SAS/BMS/Oil/Throttle), it expands diagnostics from 4 systems (Check Engine/ABS/SRS/Transmission) to vehicle All systems, including Steering, Suspension, and Body Electronics. This provides deeper, more comprehensive diagnostic capabilities.
- 【✨10 OBD2 Functions】The BOSSCOMM IF745 scan tool’s DTC Lookup instantly translates fault codes into user-friendly explanations, its I/M Readiness feature streamlines emissions testing with a single tap, and Freeze Frame lets you pinpoint the exact moment of a fault for in-depth root-cause diagnosis. Combined with a live data dashboard and advanced diagnostics (O2S, OBMon, EVAP), it delivers comprehensive insights for confident troubleshooting.
- 【✨Deep Diagnostics for All Vehicle System Modules】Beyond code reading/clearing and ECU information retrieval, our all-in-one data stream feature lets you inspect all current fault codes and their locations across the vehicle’s systems. This vehicle code reader helps you turn off dashboard warning lights and perform a comprehensive self-check of your car at home—no more back-and-forth trips to the repair shop or hefty inspection fees.
- 【✨6 Essential Resets: ABS Bleeding, Oil, EPB, SAS, Throttle, BMS】The BOSSCOMM IF745 obd2 scanner diagnostic tool swiftly purges air from brake lines to restore braking sensitivity, fine-tunes maintenance cycles to eliminate false alerts, resolves parking brake issues with one-click control, recalibrates steering sensors for stability, optimizes engine idling/acceleration for smoother performance, and deeply resets battery systems to extend lifespan and range via precise parameter adjustments.❗NOTE: Does NOT support bidirectional control, coding, or programming.
- 【✨10,000+ Car Models, AutoVIN, 13 Languages】The BOSSCOMM IF745 vehicle scanner diagnostic tool covers 73+ global car brands and offers support in 13 languages, making it perfect for DIYers, auto mechanics, or as a thoughtful gift. With a single-click AutoVIN feature, it instantly retrieves vehicle serial numbers, streamlining diagnostics for users globally. This adaptable tool balances user-friendliness with precision, catering to both personal and professional requirements.✅Unsure about compatibility? Compatibility will vary on vehicles' model and year, pls reach us via 📧 [email protected] 📧 before purchase.
This product presentation was made with AAWP plugin.