NHTSA ID Number: 11031854
Manufacturer Communication Number: SC340_TSB_R5
TSB/Document Date: 2026-05-01
Summary
VOLUNTARY EMISSIONS SERVICE CAMPAIGN: THETA II 2.4L GDI EMISSIONS: ECM LOGIC IMPROVEMENT (SC340 REVISION 5) - 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 2016-2020MY Optima, 2016-2020MY Sorento, 2017-2022MY Sportage 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.
JFAGNC4EMD1M
(JF/JFa)
JFAGNS4ERB0A
16-17MY
JFAGNS4ERB0B
JFAGNS4ERC0A
JFAGNS4ERC3A
JFAGNS4ERCXA
JFAGNS4ERC3K
Yes
39108 2GGD5
JFAGNS4ERC3L
JFAGNS4ERC3M
JFAGNS4ERD11
JFAGNS4ERD1K
JFAGNS4ERD1L
ECM
JFAGNS4ERD1M
(SULEV)
JFAGNS4EMB0A
JFAGNS4ERDXA
JFAGNS4EMB0B
JFAGNS4EMC0A
JFAGNS4EMC3A
JFAGNS4EMCXA
JFAGNS4EMC3K
No
39108 2GGD0
JFAGNS4EMC3L
JFAGNS4EMC3M
JFAGNS4EMD11
JFAGNS4EMD1K
JFAGNS4EMD1L
JFAGNS4EMD1M
Continued…
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 5) Multiple Models November 2025
JFAGNS4EMDXA
Page 19 of 28
SUBJECT:
THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340)
Upgrade Event #959 Optima (JF/JFa)
Model
System
IMMO
ECU P/No.
ROM ID
Previous
New
JFAHNC4ERC3A
JFAHNC4ERC3B
JFAHNC4ERC31
39108 2GGC6
JFAHNC4ERC32
JFAHNC4ERCXA
JFAHNC4ERC33
JFAHNC4ERC34
JFAHNC4ERC35
Yes
JFAHNC4ERD1A
JFAHNC4ERD11
39108 2GGC8
JFAHNC4ERD12
JFAHNC4ERD13
JFAHNC4ERDXA
JFAHNC4ERD14
JFAHNC4ERD15
JFAHNC4EMC3A
JFAHNC4EMC3B
JFAHNC4EMC31
39108 2GGC1
JFAHNC4EMC32
JFAHNC4EMCXA
JFAHNC4EMC33
Optima
(JF/JFa)
16-17MY
JFAHNC4EMC34
ECM
JFAHNC4EMC3C
(ULEV)
JFAHNC4EMD1A
JFAHNC4EMD11
39108 2GGC3
JFAHNC4EMD12
JFAHNC4EMD13
JFAHNC4EMDXA
JFAHNC4EMD14
JFAHNC4EMD1B
No
JFAHNC4EMC3K
JFAHNC4EMC3L
JFAHNC4EMC35
39108 2GGL1
JFAHNC4EMC36
JFAHNC4EMCXB
JFAHNC4EMC37
JFAHNC4EMC38
JFAHNC4EMC3M
JFAHNC4EMD1K
JFAHNC4EMD15
39100 2GGL2
JFAHNC4EMD16
JFAHNC4EMD17
JFAHNC4EMDXB
JFAHNC4EMD18
JFAHNC4EMD1L
Continued…
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 5) Multiple Models November 2025
Page 20 of 28
SUBJECT:
THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340)
Upgrade Event #959 Optima (JF/JFa)
Model
System
IMMO
ECU P/No.
ROM ID
Previous
New
JFAHNS4ERC3A
JFAHNS4ERC3B
JFAHNS4ERC31
39108 2GGD6
JFAHNS4ERC32
JFAHNS4ERCXA
JFAHNS4ERC33
JFAHNS4ERC34
JFAHNS4ERC35
Yes
JFAHNS4ERD1A
JFAHNS4ERD11
39108 2GGD8
JFAHNS4ERD12
JFAHNS4ERD13
JFAHNS4ERDXA
JFAHNS4ERD14
JFAHNS4ERD15
JFAHNS4EMC3A
JFAHNS4EMC3B
JFAHNS4EMC31
39108 2GGD1
JFAHNS4EMC32
JFAHNS4EMCXA
JFAHNS4EMC33
Optima
(JF/JFa)
16-17MY
JFAHNS4EMC34
ECM
JFAHNS4EMC3C
(SULEV)
JFAHNS4EMD1A
JFAHNS4EMD11
39108 2GGD3
JFAHNS4EMD12
JFAHNS4EMD13
JFAHNS4EMDXA
JFAHNS4EMD14
JFAHNS4EMD1B
No
JFAHNS4EMC3K
JFAHNS4EMC3L
JFAHNS4EMC35
39108 2GGM1
JFAHNS4EMC36
JFAHNS4EMCXB
JFAHNS4EMC37
JFAHNS4EMC38
JFAHNS4EMC3M
JFAHNS4EMD1K
JFAHNS4EMD15
39100 2GGM2
JFAHNS4EMD16
JFAHNS4EMDXB
JFAHNS4EMD18
JFAHNS4EMD1L
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: SC340 (Rev 5) Multiple Models November 2025
Page 21 of 28
THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340)
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.
UPGRADE EVENT:
Select the applicable ‘ECM’ system module and the Event
Group for the affected vehicle:
•
876.UMa PE Theta 2.4 Emission Logic
Improvement (19MY)
or
•
877.UMa PE Theta 2.4 Emission Logic
Improvement (20MY)
or
•
878.JFa
PE
Theta
2.4
Emission
Logic
Improvement (19-20MY)
or
•
879.QL/QL PE Theta 2.4 Emission Logic
Improvement (19-21MY)
or
•
889.UMa
Theta
2.4
Emission
Logic
Emission
Logic
Improvementl(18MY)
or
•
890.JF/JFa
Theta
2.4
Improvement (18MY)
Verify the affected vehicle Calibration Identification
or
•
891.QL
Theta
2.4
Emission
Logic
Emission
Logic
Emission
Logic
Emission
Logic
Emission
Logic
Improvement (18MY)
of the applicable ECU ROM ID and reference the
Information Table on pages 3 - 20 as necessary.
or
•
914.QL
PE
Theta
2.4
Improvement (22MY)
or
•
925.QL
Theta
2.4
Improvement (17MY)
or
932.UMa
Theta
2.4
Improvement (16-17MY)
or
•
959.JF/JFa
Theta
2.4
Improvement (16-17MY)
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 5) Multiple Models November 2025
Page 22 of 28
THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340)
SUBJECT:
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.
Event No.
Menu
UMA 2.4 GDI +IMMO/SMK 18MY(ULEV/2WD) : 39100-2GGF8
[2WD_UMAINC4ERA6A/A7A/A7B/D5A/D5B/D5K/D5M/D5O/D5Q/D5S]
UMA 2.4 GDI +IMMO/SMK 18MY(ULEV/4WD) : 39100-2GGH8
#889
[4WD_UMAINC4ERA6A/A7A/A7B/D5A/D5B/D5L/D5N/D5P/D5R/D5T]
UMA 2.4 GDI -IMMO 18MY(ULEV/2WD) : 39100-2GGF3
[2WD_UMAINC4EMA6A/A7A/A7B/D5A/D5B/D5K/D5M/D5O/D5Q/D5S]
UMA 2.4 GDI -IMMO 18MY(ULEV/4WD) : 39100-2GGH3
[4WD_UMAINC4EMA6A/A7A/A7B/D5A/D5B/D5L/D5N/D5P/D5R/5DT]
UMA PE 2.4 GDI +IMMO/SMK 19MY(ULEV/2WD): 39171-2GMN0
[2WD_UPAJNC4ERE1A/E1B/E1C/E1D/G1A/G1B/G1C/G1D]
UMA PE 2.4 GDI +IMMO/SMK 19MY(ULEV/4WD): 39171-2GMN1
#876
[4WD_UPAJNC4ERE1A/E1B/E1C/E1D/G1K/G1L/G1M/G1N]
UMA PE 2.4 GDI -IMMO 19MY(ULEV/2WD) : 39173-2GMA0
[2WD_UPAJNC4EME1A/E1B/E1C/E1D/G1A/G1B/G1C/G1D]
UMA PE 2.4 GDI -IMMO 19MY(ULEV/4WD) : 39173-2GMA1
[4WD_UPAJNC4EME1A/E1B/E1C/E1D/G1K/G1L/G1M/G1N]
#877
#890
Password
4554
4579
2574
2179
5932
3211
8872
5252
UMA PE 2.4 GDI +IMMO/SMK 20MY(ULEV): 39171-2GMN2/N3
2468
UMA PE 2.4 GDI -IMMO 20MY(ULEV): 39173-2GMA2/A3
3322
JF/JFa 2.4 GDI +IMMO/SMK 18MY(ULEV) : 39108-2GGC7
8719
JF/JFa 2.4 GDI -IMMO 18MY(ULEV) : 39108-2GGC2
4544
JF/JFa 2.4 GDI +IMMO/SMK 18MY(SULEV) : 39108-2GGD7
1083
JF/JFa 2.4 GDI -IMMO 18MY(SULEV) : 39108-2GGD2
6922
JF/JFa PE 2.4GDI SULEV +IMMO/SMK(20MY): 39171-2GJL1
1624
JF/JFa PE 2.4GDI SULEV -IMMO(20MY): 39171-2GJL6
6349
Continued …
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 5) Multiple Models November 2025
Page 23 of 28
THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340)
SUBJECT:
Event No.
#878
#879
#891
#914
Menu
Password
JFa PE 2.4GDI ULEV +IMMO/SMK(19MY): 39171-2GJK0
7222
JFa PE 2.4GDI ULEV -IMMO(19MY): 39171-2GJK5
5744
JFa PE 2.4GDI SULEV +IMMO/SMK(19MY): 39171-2GJL0
9911
JFa PE 2.4GDI SULEV -IMMO(19MY): 39171-2GJL5
3455
JFa PE 2.4GDI ULEV +IMMO/SMK(20MY): 39171-2GJK1
4342
JFa PE 2.4GDI ULEV -IMMO(20MY): 39171-2GJK6
7230
JFa PE 2.4GDI SULEV +IMMO/SMK(20MY): 39171-2GJL1
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TSB/Document ID: SC340_TSB_R5
Replacement Service Bulletin Number:
MFR Communication Date: 2026-04-04
MFR Internal Campaign ID/Software Version: SC340
Communication Type: Emissions
NHTSA Components: ENGINE
MFR Component System:
MFR Component Subsystem:
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