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.
QLDJNS4EMGXA
QLDJNS4EMG1D
QLDJNS4EMG1E
No
QLDJNS4EME2K
QLDJNS4EMG1L
39100 2GHW2
QLDJNS4EMG1M
QLDJNS4EMGXB
QLDJNS4EMG1N
QLDJNS4EMG1O
Continued on page 12…
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 12 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
QPDKNC4ERG0A
QPDKNC4ERG2A
Yes
39171 2GRA1
QPDKNC4ERG2B
39171 2GRB1
QPDKNC4ERG3A
QPDKNC4ERGXA
QPDKNC4ERG3B
QPDKNC4ERG3C
ECM
(ULEV)
QPDKNC4EMG0A
QPDKNC4EMG2A
No
39171 2GRC1
QPDKNC4EMG2B
39171 2GRD1
QPDKNC4EMG3A
QPDKNC4EMGXA
QPDKNC4EMG3B
QPDKNC4EMG3C
Sportage
(QL)
20MY
QPDKNS4ERG0A
QPDKNS4ERG0B
Yes
39171 2GRE1
39171 2GRF1
QPDKNS4ERG2A
QPDKNS4ERG2B
QPDKNS4ERGXA
QPDKNS4ERG3A
QPDKNS4ERG3B
QPDKNS4ERG3C
ECM
(SULEV)
QPDKNS4EMG0A
QPDKNS4EMG0B
No
39171 2GRG1
39171 2GRH1
QPDKNS4EMG2A
QPDKNS4EMG2B
QPDKNS4EMG3A
QPDKNS4EMG3B
QPDKNS4EMG3C
Continued on page 13…
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
QPDKNS4EMGXA
Page 13 of 25
SUBJECT:
THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340)
Upgrade Event #879 Sportage (QL)
Model
System
IMMO
Yes
ECU P/No.
39171 2GRA2
39171 2GRB2
ROM ID
Previous
New
QPDLNC4ERG3A
QPDLNC4ERGXA
QPDLNC4EMG3A
QPDLNC4EMGXA
QPDLNS4ERG3A
QPDLNS4ERGXA
QPDLNS4EMG3A
QPDLNS4EMGXA
ECM
(ULEV)
No
Sportage
39171 2GRC2
39171 2GRD2
(QL)
21MY
Yes
39171 2GRE2
39171 2GRF2
ECM
(SULEV)
No
39171 2GRG2
39171 2GRH2
Upgrade Event #914 Sportage (QL)
Model
System
IMMO
ECU P/No.
39171 2GRA3
ROM ID
Previous
QPNNLM_A_S2A
QPNNLM_A_S2B
New
QPNNLM_A_SXA
Yes
39171 2GRB3
ECM
(ULEV)
39171 2GRC3
QPNNLM_G_S2A
QPNNLM_G_S2B
QPNNLS_A_S2A
QPNNLS_A_S2B
QPNNLM_G_SXA
QPNNLS_A_SXA
No
39171 2GRD3
Sportage
QPNNLS_G_S2A
QPNNLS_G_S2B
QPNNLS_G_SXA
(QL)
22MY
39171 2GRE3
QPNSLM_A_S2A
QPNSLM_A_S2B
QPNSLM_A_SXA
Yes
39171 2GRF3
ECM
(SULEV)
39171 2GRG3
QPNSLM_G_S2A
QPNSLM_G_S2B
QPNSLS_A_S2A
QPNSLS_A_S2B
QPNSLM_G_SXA
QPNSLS_A_SXA
No
39171 2GRH3
QPNSLS_G_S2A
QPNSLS_G_S2B
QPNSLS_G_SXA
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 4) Multiple Models November 2025
Page 14 of 25
SUBJECT:
THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340)
Upgrade Event #920 Optima (JF/JFa)
Model
System
IMMO
ECU P/No.
ROM ID
Previous
New
JFAGNC4ERB0A
JFAGNC4ERB0B
JFAGNC4ERC0A
JFAGNC4ERC3A
JFAGNC4ERC3K
Yes
39108 2GGC5
JFAGNC4ERC3L
JFAGNC4ERDXA
JFAGNC4ERC3M
JFAGNC4ERD11
JFAGNC4ERD1K
JFAGNC4ERD1L
JFAGNC4ERD1M
ECM
(ULEV)
JFAGNC4EMB0A
JFAGNC4EMB0B
JFAGNC4EMC0A
JFAGNC4EMC3A
JFAGNC4EMC3K
No
39108 2GGC0
JFAGNC4EMC3L
JFAGNC4EMDXA
JFAGNC4EMC3M
JFAGNC4EMD11
JFAGNC4EMD1K
JFAGNC4EMD1L
Optima
JFAGNC4EMD1M
(JF/JFaQL)
16-17MY
JFAGNS4ERB0A
JFAGNS4ERB0B
JFAGNS4ERC0A
JFAGNS4ERC3A
JFAGNS4ERC3K
Yes
39108 2GGD5
JFAGNS4ERC3L
JFAGNS4ERDXA
JFAGNS4ERC3M
JFAGNS4ERD11
JFAGNS4ERD1K
JFAGNS4ERD1L
JFAGNS4ERD1M
ECM
(SULEV)
JFAGNS4EMB0A
JFAGNS4EMB0B
JFAGNS4EMC0A
JFAGNS4EMC3A
JFAGNS4EMC3K
No
39108 2GGD0
JFAGNS4EMC3L
JFAGNS4EMC3M
JFAGNS4EMD11
JFAGNS4EMD1K
JFAGNS4EMD1L
JFAGNS4EMD1M
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
JFAGNS4EMDXA
Page 15 of 25
SUBJECT:
THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340)
Upgrade Event #920 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
JFAHNC4EMC3C
ECM
(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
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 16 of 25
SUBJECT:
THETA II 2.4L GDI EMISSIONS ECM LOGIC IMPROVEMENT (SC340)
Upgrade Event #920 Optima (JF/JFa)
Model
System
IMMO
ECU P/No.
ROM ID
Previous
New
JFAHNS4ERC3A
JFAHNS4ERC3B
JFAHNS4ERC31
39108 2GGD6
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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: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
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