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.
JFAINS4EMD5L
JFAINS4EMD5N
JFAINS4EMD5O
Continued on page 7…
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
JFAINS4EMDXA
Page 7 of 25
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
JPAJNC4EMG1I
Optima
JPAJNC4EMG1J
(JFa)
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 8…
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 8 of 25
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
JPAKNC4ERG11
JPAKNC4ERG1A
JPAKNC4ERG1B
Yes
39171 2GJK1
JPAKNC4ERG1C
JPAKNC4ERGXA
JPAKNC4ERG3A
JPAKNC4ERG3B
JPAKNC4ERG3C
ECM
(ULEV)
JPAKNC4EMG11
JPAKNC4EMG1A
JPAKNC4EMG1B
No
39171 2GJK6
JPAKNC4EMG1C
JPAKNC4EMGXA
JPAKNC4EMG3A
JPAKNC4EMG3B
JPAKNC4EMG3C
Optima
(JFa)
20MY
JPAKNS4ERG11
JPAKNS4ERG1A
JPAKNS4ERG1B
Yes
39171 2GJL1
JPAKNS4ERG1C
JPAKNS4ERGXA
JPAKNS4ERG3A
JPAKNS4ERG3B
JPAKNS4ERG3C
ECM
(SULEV)
JPAKNS4EMG11
JPAKNS4EMG1A
JPAKNS4EMG1B
No
39171 2GJL6
JPAKNS4EMG1C
JPAKNS4EMG3A
JPAKNS4EMG3B
JPAKNS4EMG3C
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
JPAKNS4EMGXA
Page 9 of 25
SUBJECT:
THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340)
Upgrade Event #891 Sportage (QL)
Model
System
IMMO
ECU P/No.
ROM ID
Previous
New
QLDINC4ERC3A
QLDINC4ERCAA
QLDINC4ERCAB
Yes
39100 2GHR6
QLDINC4ERD51
QLDINC4ERD52
QLDINC4ERDXA
QLDINC4ERD54
QLDINC4ERD5A
QLDINC4ERD5B
QLDINC4ERC3K
QLDINC4ERCAK
QLDINC4ERCAM
Yes
39100 2GHS6
QLDINC4ERD55
QLDINC4ERD56
QLDINC4ERDXB
QLDINC4ERD58
QLDINC4ERD5K
Sportage
(QL)
18MY
QLDINC4ERD5L
ECM
(ULEV)
QLDINC4EMC3A
QLDINC4EMCAA
QLDINC4EMCAB
No
39100 2GHS1
QLDINC4EMD51
QLDINC4EMD52
QLDINC4EMDXA
QLDINC4EMD54
QLDINC4EMD5A
QLDINC4EMD5B
QLDINC4EMC3K
QLDINC4EMCAK
QLDINC4EMCAM
No
9100 2GHT1
QLDINC4EMD55
QLDINC4EMD56
QLDINC4EMDXB
QLDINC4EMD58
QLDINC4EMD5K
QLDINC4EMD5L
Continued on page 10
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 10 of 25
SUBJECT:
THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340)
Upgrade Event #891 Sportage (QL)
Model
System
IMMO
ECU P/No.
ROM ID
Previous
New
QLDINS4ERC3A
QLDINS4ERCAA
QLDINS4ERCAB
Yes
39100 2GHT6
QLDINS4ERD51
QLDINS4ERD52
QLDINS4ERDXA
QLDINS4ERD54
QLDINS4ERD5A
QLDINS4ERD5B
QLDINS4ERC3K
QLDINS4ERCAK
QLDINS4ERCAM
Yes
39100 2GHV6
QLDINS4ERD55
QLDINS4ERD56
QLDINS4ERDXB
QLDINS4ERD58
QLDINS4ERD5K
Sportage
(QL)
18MY
QLDINS4ERD5L
ECM
(SULEV)
QLDINS4EMC3A
QLDINS4EMCAA
QLDINS4EMCAB
No
39100 2GHV1
QLDINS4EMD51
QLDINS4EMD52
QLDINS4EMDXA
QLDINS4EMD54
QLDINS4EMD5A
QLDINS4EMD5B
QLDINS4EMC3K
QLDINS4EMCAK
QLDINS4EMCAM
No
39100 2GHW1
QLDINS4EMD55
QLDINS4EMD56
QLDINS4EMD58
QLDINS4EMD5K
QLDINS4EMD5L
Continued on page 11
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
QLDINS4EMDXB
Page 11 of 25
SUBJECT:
THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340)
Upgrade Event #879 Sportage (QL)
Model
System
IMMO
ECU P/No.
ROM ID
Previous
New
QLDJNC4ERE2A
QLDJNC4ERG1B
39100 2GHR7
QLDJNC4ERG1C
QLDJNC4ERGXA
QLDJNC4ERG1D
QLDJNC4ERG1E
Yes
QLDJNC4ERE2K
QLDJNC4ERG1L
39100 2GHS7
QLDJNC4ERG1M
QLDJNC4ERGXB
QLDJNC4ERG1N
QLDJNC4ERG1O
ECM
(ULEV)
QLDJNC4EME2A
QLDJNC4EMG1B
39100 2GHS2
QLDJNC4EMG1C
QLDJNC4EMGXA
QLDJNC4EMG1D
QLDJNC4EMG1E
No
QLDJNC4EME2K
QLDJNC4EMG1L
39100 2GHT2
QLDJNC4EMG1M
QLDJNC4EMGXB
QLDJNC4EMG1N
Sportage
QLDJNC4EMG1O
(QL)
QLDJNS4ERE2A
19MY
QLDJNS4ERG1B
39100 2GHT7
QLDJNS4ERG1C
QLDJNS4ERGXA
QLDJNS4ERG1D
QLDJNS4ERG1E
Yes
QLDJNS4ERE2K
QLDJNS4ERG1L
39100 2GHV7
QLDJNS4ERG1M
QLDJNS4ERGXB
QLDJNS4ERG1N
QLDJNS4ERG1O
ECM
(SULEV)
QLDJNS4EME2A
QLDJNS4EMG1B
39100 2GHV2
QLDJNS4EMG1C
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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:
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