GROUP

NUMBER

CAMPAIGN

25-01-083H

DATE

Technical Service Bulletin

MODEL(S)

NOVEMBER 2025

SEE BELOW

ECU SOFTWARE UPDATE - DTC P04DB00
(LIMITED COVERAGE CAMPAIGN LA11)

SUBJECT:

 IMPORTANT
Dealers must perform this field action on all affected vehicles within 8 / 80,000 Emissions Warranty
prior to customer retail delivery and whenever an affected vehicle is in the shop for any
maintenance or repair. See Warranty Information section for more details.
Access the “Vehicle Information” screen via WebDCS to verify “Warranty Start Date” and ensure the
vehicle is within Emissions Warranty, observing mileage prior to any repair work.
Description: Certain Tucson Hybrid (NX4 HEV) and Tucson Plug-in Hybrid (NX4 PHEV) vehicles
equipped with the 1.6T-GDI Gamma II engine may set DTC P04DB00 (Crankcase Ventilation System
Disconnected). This bulletin provides instructions to perform a software update on the Engine Control
Module (ECM) to resolve this condition.

Applicable Vehicles (Certain):
Model Year
2025

Model

Engine

Tucson Hybrid (NX4 HEV)
Tucson Plug-in Hybrid (NX4 PHEV)

Production Dates

1.6T-GDI Gamma II

06/18/2024 - 08/21/2025
07/09/2024 - 08/14/2025

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

SUBJECT: ECU SOFTWARE UPDATE - DTC P04DB00 (LIMITED COVERAGE CAMPAIGN LA11)

GDS Information:
Model

System

Event Number*

Description

Tucson Hybrid (NX4 HEV)
&
NX4 HEV/PHEV GAMMA2 DTC P04DB
Engine
1324
Tucson Plug-in Hybrid
IMPROVEMENT
(NX4 PHEV)
(*or use a later available event listed in the GDS Engine Update screen if one is available.)
NOTE: The software update is subject to an OTA (Over-the-Air) option and may be completed by
customers with an active Bluelink Services subscription.
Warranty Information:
Model

Op. Code

Operation

Op.
Time

Causal Part

Nature Cause
Code Code

Tucson Hybrid
(NX4 HEV)
&
50D270R0
ECU Update 0.3 M/H
39135-2MNC0
I11
ZZ3
Tucson Plug-in Hybrid
(NX4 PHEV)
NOTE 1: Submit claim on Claim Entry Screen as "Campaign" type.
NOTE 2: 8 / 80,000 Emissions Warranty applies to the part(s) and repair procedure(s) outlined in this
TSB. Prior to beginning any repair work, ensure the part(s) associated with the repair procedure are
within Emissions Warranty, observing mileage and Warranty Start Date or date of first use. If the
subject part(s) 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 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.
ROM ID Information:
Model
Tucson Hybrid
(NX4 HEV)
&
Tucson Plug-in
Hybrid
(NX4 PHEV)

Event

1324

TSB #: 25-01-083H

System

ROM ID

ECU
Part Number

Current

Latest

39135-2MNC0

JNX45NS06F0C6F00

JNX45NS06F1C6F00

39135-2MNH0

QNX45NS06F0C6F00

QNX45NS06F1C6F00

Engine

Page 2 of 6

SUBJECT: ECU SOFTWARE UPDATE - DTC P04DB00 (LIMITED COVERAGE CAMPAIGN LA11)

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 update failure.

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 the update.

•

Do NOT place the vehicle in Ready mode during the update.

•

Do NOT turn OFF the ignition switch during the update.

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.

TSB #: 25-01-083H

Page 3 of 6

SUBJECT: ECU SOFTWARE UPDATE - DTC P04DB00 (LIMITED COVERAGE CAMPAIGN LA11)

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 in-cabin fuse box for
at least 5 seconds. Alternatively,
disconnect the negative (–) 12V battery
terminal, wait at least 5 seconds.
Reassemble and 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 #: 25-01-083H

Page 4 of 6

SUBJECT: ECU SOFTWARE UPDATE - DTC P04DB00 (LIMITED COVERAGE CAMPAIGN LA11)

4.

OTA initialization (A) should perform
automatically:
• If OTA initialization performs
automatically, then proceed with the
service procedure.
•

A

If the OTA initialization process fails,
complete it manually under:
S/W Management > CCU_CCNF Central Communication Unit (CCNF)
> OTA Initialization (B).
Follow the instructions on the screen.

B

5.

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.

TSB #: 25-01-083H

Page 5 of 6

SUBJECT: ECU SOFTWARE UPDATE - DTC P04DB00 (LIMITED COVERAGE CAMPAIGN LA11)

6.

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

7.

Place the vehicle in Ready mode to confirm
proper operation of the vehicle.

8.

The service procedure is now complete.

NOTICE
If the ECU update fails in Auto Mode, perform the update in Manual Mode using the password(s)
below.
Manual Mode Password:
Event
1324

TSB #: 25-01-083H

ECU Menu

Password

NX4KH_ECU_1_391352MNC0

4212

NX4KH_ECU_1_391352MNH0

8283

Page 6 of 6