GROUP

NUMBER

CAMPAIGN

Technical Service Bulletin
SUBJECT:

26-01-013H-1

DATE

MODEL(S)

MARCH 2026

SEE BELOW

ECU SOFTWARE UPDATE FOR THETA II EMISSIONS
IMPROVEMENT (SERVICE CAMPAIGN 9C2)

This TSB supersedes 26-01-013H to add 2015MY Sonata (LFA) vehicles, along with a new
software event (1383) and associated GDS, Warranty, ROM ID, and Manual Mode Password
information.

 IMPORTANT
Dealers must perform this service campaign on all affected vehicles prior to customer retail delivery
and whenever an affected vehicle is in the shop for any maintenance or repair.
Access the “Vehicle Information” screen via WebDCS to identify open campaigns.
Description: Certain Santa Fe (TMA), Santa Fe Sport (AN), Sonata (LFA), and Tucson (TL) vehicles
equipped with Theta II engines may exhibit elevated engine-out emissions. This bulletin provides
instructions for updating the Engine Control Module (ECM) to address this condition.

Applicable Vehicles (Certain):
Model Year

Model

2019 - 2020

Santa Fe (TMA)

2017 - 2018
2015 - 2019
2018 - 2021

Santa Fe Sport (AN)
Sonata (LFA)
Tucson (TL)

Engine

Production Dates
05/23/2018 - 08/23/2021

2.4L GDI Theta II

06/20/2016 - 04/19/2018
05/01/2014 – 09/30/2019
01/30/2018 - 02/04/2021

Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service
Advisors, Technicians, Body Shop Manager, Fleet Repair

SUBJECT: ECU SOFTWARE UPDATE FOR THETA II EMISSIONS IMPROVEMENT (SERVICE CAMPAIGN 9C2)

Parts Information:
Model

Part Name

Part Number

Figure

Remarks

9C2
Santa Fe
Emissions Label
(TMA),
Santa Fe
Sport (AN),
Sonata
(LFA),
&
Vehicle Emission
Tucson
Recall - Proof of
(TL)
Correction Card

NP001-SC9C2
NP001-SC9C2

Apply to all
vehicles
regardless of
state
Order only for
states:
CA, CO, CT,
DE, ME, MD,
MA, NJ, NY,
OR, PA, RI,
VT, WA

NP050-09006

SST Information:
Tool Name

Tool Number

VCI 3

G0VHNNN06

Figure

Ordering Information
Website:
https://hyundaiessentialtools.com/
Email:
[email protected]

VCI 2

G1XDDMN001

Phone: 1-855-763-9199
Hours: 7 AM – 7 PM CST

NOTE: VCI 2 can NO longer be ordered but can be used for the updates in this TSB.

TSB #: 26-01-013H-1

Page 2 of 21

SUBJECT: ECU SOFTWARE UPDATE FOR THETA II EMISSIONS IMPROVEMENT (SERVICE CAMPAIGN 9C2)

GDS Information:
Event
Number*

Description

1329

LFa PE ECU UPGRADE - EMISSION LOGIC IMPROVEMENT

1330

LFa ECU UPGRADE - EMISSION LOGIC IMPROVEMENT (18MY)

1367

LFa ECU UPGRADE - EMISSION LOGIC IMPROVEMENT (17MY)

1372

LFa ECU UPGRADE - EMISSION LOGIC IMPROVEMENT (16MY)

1383

LFa ECU UPGRADE - EMISSION LOGIC IMPROVEMENT (15MY)

Santa Fe
(TMA)

1267

TMa ECU UPGRADE - EMISSION LOGIC IMPROVEMENT

Santa Fe
Sport
(AN)

1373

DMa(AN) PE ECU UPGRADE - EMISSION LOGIC IMPROVEMENT
(17~18MY)

1269

TL PE ECU UPGRADE - EMISSION LOGIC IMPROVEMENT

1331

TL ECU UPGRADE - EMISSION LOGIC IMPROVEMENT (18MY)

Model

System

Sonata
(LFA)

Engine

Tucson
(TL)

(*or use a later available event listed in the GDS Engine Update screen if one is available.)

TSB #: 26-01-013H-1

Page 3 of 21

SUBJECT: ECU SOFTWARE UPDATE FOR THETA II EMISSIONS IMPROVEMENT (SERVICE CAMPAIGN 9C2)

Warranty Information:
Model

Op. Code

Sonata
(LFA)

50D115R0

Santa Fe
Sport (AN)

50D115R1

Santa Fe
(TMA)

50D115R2

Tucson
(TL)

50D115R3

Sonata (LFA),
Santa Fe (TMA),
& Tucson (TL)
w/BOTH
50D115R8
Campaigns
953 & 9C2
Open

Operation

Op.
Time

Causal Part

Nature
Code

Cause
Code

M73

ZZ3

28510-2GAV0
Theta II ECU
Software Update +
Emissions Label
Application

0.4
M/H

28510-2G455
28510-2GBB0
28510-2EMN0

Administrative +
Emissions Label
Application:
Refer to NOTE 4
Below

28510-2GAV0
(LFA)
0.2
M/H

28510-2GBB0
(TMA)
28510-2EMN0
(TL)

Santa Fe Sport
Administrative +
(AN)
Emissions Label
w/BOTH
0.2
50D115R9
Application:
28510-2G455
Campaigns
M/H
Refer to NOTE 4
953 & 9C2
Below
Open
NOTE 1: Submit claim on Claim Entry Screen as “Campaign” type.
NOTE 2: If any part(s) not subject to this TSB are found in need of replacement while performing the
repair procedure, and the affected part(s) are still under warranty, the dealer may submit a separate
claim using the same repair order. If the part(s) not subject to this TSB are out of warranty coverage,
the dealer has the option to submit a PA Request for goodwill consideration on a case-by-case basis.
NOTE 3: This TSB includes repair validation photos. Op times include VIN, mileage, and photo
capture of the ECU Update “Success” screen as outlined in the Digital Documentation Policy.
NOTE 4: If both campaigns 953 and 9C2 are open on a vehicle, submit a claim with the applicable
operation code referencing the latest TSB for Service Campaign 953. Then, submit a second claim
for Service Campaign 9C2 using operation code 50D115R8 or 50D115R9 for the applicable model.

TSB #: 26-01-013H-1

Page 4 of 21

SUBJECT: ECU SOFTWARE UPDATE FOR THETA II EMISSIONS IMPROVEMENT (SERVICE CAMPAIGN 9C2)

Service Procedure:

DIGITAL DOCUMENTATION
This TSB includes repair validation photos. Refer to the latest Warranty Digital Documentation
Policy for requirements.

NOTICE
You must initially perform the GDS ECU update in Auto Mode.
• If the ECU update starts but then fails in Auto Mode, perform the update in Manual Mode
to recover.

NOTICE
Ensure the vehicle’s battery charge is above 11.0 Volts and the tablet’s battery charge is above
30% before performing a software update to avoid the update from failing.

i

Information

•

Turn OFF all lamps (do NOT leave head lamp switch in auto mode) and all accessories.

•

Perform update with the ignition switch in the ON position.

•

Do NOT disconnect any cables connected to the vehicle or scan tool during update.

•

Do NOT start the engine during update.

•

Do NOT turn OFF the ignition switch during update.

Table of Contents
•

ECU Update Procedure ..................................................................................................................... 6

•

Emissions Label Application (for All Vehicles) ................................................................................. 10

•

Vehicle Emission Recall – Proof of Correction Card (for Vehicles Registered in Certain States) .... 11

TSB #: 26-01-013H-1

Page 5 of 21

SUBJECT: ECU SOFTWARE UPDATE FOR THETA II EMISSIONS IMPROVEMENT (SERVICE CAMPAIGN 9C2)

ECU Update Procedure
1.

Perform the ECU update in Auto Mode.

i

Information

Refer to TSB # 25-GI-011H, “ECU
Update Procedure for Tablet-Based
GDS-Smart”, for additional information.

2.

Verify the ROM ID by selecting the Engine
system to scan the vehicle’s current ROM ID.

NOTICE
Check the current ROM ID version and
compare it to the ROM ID Information
table before attempting to perform the
software update.

NOTICE
If the update fails, remove the power
connector from the indoor fuse box for at
least 5 seconds, then reconnect it.
Alternatively, disconnect the negative (–)
12V battery terminal, wait at least 5
seconds, then reconnect it. Retry the
update.
3.

After the ECU update process shows 100%
complete, follow the prompts on the screen to
cycle the ignition OFF for at least 10 seconds
to reset the control unit (certain models may
take up to 30 seconds).

i

Information

Use the Refresh button to reset the
timer.

TSB #: 26-01-013H-1

Page 6 of 21

SUBJECT: ECU SOFTWARE UPDATE FOR THETA II EMISSIONS IMPROVEMENT (SERVICE CAMPAIGN 9C2)

4.

DIGITAL
DOCUMENTATION

Using the tablet or GDS screen capture
function, take a screenshot of the ECU
Update “Success” result screen.
Upload the photo to STUI.
NOTE: The VIN/Date/Time/Mileage photo
imprint is NOT required for GDS
screenshots.

5.

Perform an All Systems Fault Code search
and erase DTC history that had incidentally
occurred from the ECU update.

6.

Disconnect the power connector of the indoor
fuse box, wait at least 5 seconds, then
reconnect it.

i

Information

Alternatively, disconnect the negative (–)
12V battery terminal, wait at least 5
seconds, then reconnect it.

TSB #: 26-01-013H-1

Page 7 of 21

SUBJECT: ECU SOFTWARE UPDATE FOR THETA II EMISSIONS IMPROVEMENT (SERVICE CAMPAIGN 9C2)

7.