NHTSA ID Number: 11025859
Manufacturer Communication Number: SC340_TSB_R1
TSB/Document Date: 2025-12-01
Summary
TECHNICAL SERVICE BULLETIN: VOLUNTARY SERVICE CAMPAIGN: THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340) - 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.
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TSB/Document ID: SC340_TSB_R1
Replacement Service Bulletin Number:
MFR Communication Date: 2025-11-07
MFR Internal Campaign ID/Software Version: SC340
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE
MFR Component System:
MFR Component Subsystem:
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GROUP
MODEL
Voluntary Emissions
2016-2022MY
Service Campaign
Multiple Models
NUMBER
DATE
SC340 (Rev 1, 11/07/2025)
November 2025
VOLUNTARY EMISSIONS SERVICE CAMPAIGN
THETA II 2.4L GDI EMISSIONS
SUBJECT:
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
19-20MY
Optima (JFa)
May 6, 2018 to June 23, 2020
19-20MY
Sorento (UMa)
January 22, 2018 to November 4, 2020
19-21MY
Sportage (QL)
April 2, 2018 to March 22, 2021
22MY
Sportage (QL)
On Hold Until Further Notice
16-18MY
Optima (JF, JFa), Sorento (UMa),
Sportage (QL)
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 15
SUBJECT:
THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340)
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)
879.QL/QL PE Theta 2.4 Emission Logic Improvement (22MY) *On Hold Until Further Notice
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 1) Multiple Models November 2025
Page 3 of 15
SUBJECT:
THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340)
ROM ID Information Table:
Upgrade Event #876 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
UPAJNC4ERE1A
UPAJNC4ERE1B
UPAJNC4ERE1C
39171 2GMN0
UPAJNC4ERE1D
UPAJNC4ERG1A
UPAJNC4ERGXA
UPAJNC4ERG1B
UPAJNC4ERG1C
UPAJNC4ERG1D
Yes
UPAJNC4ERE1A
UPAJNC4ERE1B
UPAJNC4ERE1C
39171 2GMN1
UPAJNC4ERE1D
UPAJNC4ERG1K
UPAJNC4ERGXB
UPAJNC4ERG1L
Sorento
(UMa)
19MY
UPAJNC4ERG1M
ECM
UPAJNC4ERG1N
(ULEV)
UPAJNC4EME1A
UPAJNC4EME1B
UPAJNC4EME1C
39173 2GMA0
UPAJNC4EME1D
UPAJNC4EMG1A
UPAJNC4EMGXA
UPAJNC4EMG1B
UPAJNC4EMG1C
UPAJNC4EMG1D
No
UPAJNC4EME1A
UPAJNC4EME1B
UPAJNC4EME1C
39173 2GMA1
UPAJNC4EME1D
UPAJNC4EMG1K
UPAJNC4EMGXB
UPAJNC4EMG1L
UPAJNC4EMG1M
UPAJNC4EMG1N
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 1) Multiple Models November 2025
Page 4 of 15
SUBJECT:
THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340)
Upgrade Event #877 (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
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 1) Multiple Models November 2025
UPAKNC4EMGXA
Page 5 of 15
SUBJECT:
THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340)
Upgrade Event #878 Optima (JFa)
Model
System
IMMO
ECU P/No.
ROM ID
Previous
New
JPAJNC4ERE3A
JPAJNC4ERE3B
JPAJNC4ERE3C
JPAJNC4ERE6D
Yes
39171 2GJK0
JPAJNC4ERE6E
JPAJNC4ERE6F
JPAJNC4ERGXA
JPAJNC4ERG1G
JPAJNC4ERG1H
JPAJNC4ERG1I
JPAJNC4ERG1J
ECM
(ULEV)
JPAJNC4EME3A
JPAJNC4EME3B
JPAJNC4EME3C
JPAJNC4EME6D
No
39171 2GJK5
JPAJNC4EME6E
JPAJNC4EME6F
JPAJNC4EMGXA
JPAJNC4EMG1G
JPAJNC4EMG1H
Optima
JPAJNC4EMG1I
(JFa)
JPAJNC4EMG1J
19MY
JPAJNS4ERE3A
JPAJNS4ERE3B
JPAJNS4ERE3C
JPAJNS4ERE6D
Yes
39171 2GJL0
JPAJNS4ERE6E
JPAJNS4ERGXA
JPAJNS4ERG1F
JPAJNS4ERG1G
JPAJNS4ERG1H
JPAJNS4ERG1I
ECM
(SULEV)
JPAJNS4EME3A
JPAJNS4EME3B
JPAJNS4EME3C
JPAJNS4EME6D
No
39171 2GJL5
JPAJNS4EME6E
JPAJNS4EMGXA
JPAJNS4EMG1F
JPAJNS4EMG1G
JPAJNS4EMG1H
JPAJNS4EMG1I
Continued on page 6…
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 1) Multiple Models November 2025
Page 6 of 15
SUBJECT:
THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340)
Upgrade Event #878 (JFa)
Model
System
IMMO
ECU P/No.
ROM ID
Previous
New
JPAKNC4ERG11
JPAKNC4ERG1A
JPAKNC4ERG1B
Yes
39171 2GJK1
JPAKNC4ERG1C
JPAKNC4ERGXA
JPAKNC4ERG3A
JPAKNC4ERG3B
JPAKNC4ERG3C
ECM
(ULEV)
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