NHTSA ID Number: 11018891
Manufacturer Communication Number: 25-AT-001H TSB
TSB/Document Date: 2025-06-03
Summary
Certain Santa Fe (TMA) and Sonata (DN8/DN8A) vehicles equipped with 8-speed dual clutch transmissions
(8DCT) may exhibit one of the DTCs listed below, related to the high pressure electric oil pump (HP EOP). Follow the procedures in this TSB to update the Transmission Control Unit (TCU) to the latest sensorless logic on affected vehicles, and then perform air bleeding and transmission learning.
GROUP
AUTOMATIC
TRANSMISSION
DATE
Technical Service Bulletin
MAY 2025
NUMBER
25-AT-001H
MODEL(S)
SANTA FE (TMA)
SONATA
(DN8/DN8A)
TCU SOFTWARE UPDATE FOR 8DCT HP EOP
SENSORLESS LOGIC
SUBJECT:
Description: Certain Santa Fe (TMA) and Sonata (DN8/DN8A) vehicles equipped with 8-speed dual
clutch transmissions (8DCT) may exhibit one of the DTCs listed below, related to the high pressure
electric oil pump (HP EOP). Follow the procedures in this TSB to update the Transmission Control Unit
(TCU) to the latest sensorless logic on affected vehicles, and then perform air bleeding and
transmission learning.
HP EOP DTCs
DTC
Description
P1C2D03
HP EOP Motor Position Sensor
P1C2D1C
HP EOP Motor Position Sensor
P1C2E92
HP EOP Motor Control
Applicable Vehicles:
• 2021–2023MY Santa Fe (TMA) equipped with 8DCT
• 2021-2022MY Sonata (DN8/DN8A) equipped with 8DCT
GDS Information:
System
AT /
Transmission
Event
Number
Description
1125
TMa PE 2.5T 8DCT HP EOP SENSORLESS LOGIC UPDATE
WHEN MOTOR MIL ILLUMINATE
DN8a N 2.5T 8DCT HP EOP SENSORLESS LOGIC UPDATE
WHEN MOTOR MIL ILLUMINATE
(or use a later available event as listed in the GDS AT/Transmission Update screen if one is
available.)
1126
Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service
Advisors, Technicians, Body Shop Manager, Fleet Repair
SUBJECT:
TCU SOFTWARE UPDATE FOR 8DCT HP EOP SENSORLESS LOGIC
SST Information:
Tool Name
Tool Number
VCI 3
G0VHNNN06
VCI 2
Figure
Remarks
Ordering Information
VCI 3 comes with
the 19-pin cable
(P/N G1XDDCA020)
Website:
https://hyundaiessentialtools.com/
Email:
[email protected]
Phone: 1-855-763-9199
Hours: 7 AM – 7 PM CST
G1XDDMN001
Warranty Information:
Model
Op. Code
Operation
Op.
Time
Causal Part
Nature
Code
Cause
Code
954A1F06
TCU Update
+
Air Bleeding
+
DCT Learning
0.8
M/H
Refer to applicable
part on page 3 for
appropriate model
W17
ZZ3
Santa Fe
(TMA)
Sonata
(DN8/DN8A)
NOTE 1: Normal warranty applies.
NOTE 2: Submit claim on Claim Entry Screen as “Warranty” type.
NOTE 3: If a part is found in need of replacement while performing this TSB and the affected part is
still under warranty, submit a separate claim using the same repair order. If the affected part is out of
warranty, submit a Prior Approval request for goodwill consideration prior to performing the work.
TSB #: 25-AT-001H
Page 2 of 11
SUBJECT:
TCU SOFTWARE UPDATE FOR 8DCT HP EOP SENSORLESS LOGIC
ROM ID Information:
System
Model
ECU
Part Number
ROM ID
Old
New
VTMPT25XXX720NS0
VTMPT25XXX720NS1
VTMPT25XXX730NS2
VTMPT25XXX800NS3
Santa Fe
(TMA)
(w/ 2.5T &
SBW)
VTMPT25XXX800NS4
954A1-2N250
VTMPT25XXX800NS5
VTMPT25XXX832NS6
VTMPT25XXX920NSC
VTMPT25XXX900NS8
VTMPT25XXX900NSA
VTMPT25XXX920NSB
VTMPT25XXW900NS1
VTMPT25XXW920NS2
VDN8T25XXX700NS0
AT /
Transmission
VDN8T25XXX700NS1
VDN8T25XXX720NS2
VDN8T25XXX720NS3
VDN8T25XXX720NS4
Sonata
(DN8/DN8A)
(w/ 2.5T &
SBW)
954A1-2N060
VDN8T25XXX730NS5
VDN8T25XXX800NS6
VDN8T25XXX920NSE
VDN8T25XXX832NS7
VDN8T25XXX832NS8
VDN8T25XXX900NSA
VDN8T25XXX900NSC
VDN8T25XXX920NSD
VDN8T25XXW900NS0
954A1-2N061
VDN8T25XXW900NS1
VDN8T25XXW920NS3
VDN8T25XXW920NS2
TSB #: 25-AT-001H
Page 3 of 11
SUBJECT:
TCU SOFTWARE UPDATE FOR 8DCT HP EOP SENSORLESS LOGIC
Service Procedure:
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
•
Service Procedure Flowchart ................................................................................................... 5
•
ECU Update Procedure............................................................................................................ 6
•
Air Bleeding Procedure ............................................................................................................ 9
•
DCT Learning Procedure ....................................................................................................... 10
•
Vehicle Driving Inspection ...................................................................................................... 11
TSB #: 25-AT-001H
Page 4 of 11
SUBJECT:
TCU SOFTWARE UPDATE FOR 8DCT HP EOP SENSORLESS LOGIC
Service Procedure Flowchart
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TSB/Document ID: 25-AT-001H TSB
Replacement Service Bulletin Number:
MFR Communication Date: 2025-05-30
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: POWER TRAIN
MFR Component System:
MFR Component Subsystem:
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