GROUP

NUMBER

CAMPAIGN

Technical Service Bulletin
SUBJECT:

DATE

25-01-010H-1
MODEL(S)

JULY 2025

SEE BELOW

BMS SOFTWARE UPDATE FOR DTC P1BB200: 12V BATTERY
OVER VOLTAGE WARNING (SERVICE CAMPAIGN 9B4)

This TSB supersedes 25-01-010H to update the Op. Code on page 2, and add vehicle emission
related documents, including campaign sticker and proof of correction card, on pages 2, 8,
and 9.

 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: This bulletin provides the procedure to update the software for the Battery Management
System (BMS) on certain Elantra Hybrid (CN7 HEV), Sonata Hybrid (DN8 HEV), and Tucson Hybrid
(NX4 HEV) vehicles that may exhibit a warning light with DTC P1BB200 and enter Limp Mode.
DTC Description: P1BB200 – 12V Lithium Battery Cell Voltage High
Applicable Vehicles (Certain):
• 2021–2023MY Elantra Hybrid (CN7 HEV) produced from 12/15/2020 - 02/13/2023
• 2020-2022MY Sonata Hybrid (DN8 HEV) produced from 01/29/2020 - 03/08/2022
• 2022–2024MY Tucson Hybrid (NX4 HEV) produced from 01/20/2021 - 12/18/2023

GDS Information:
System

BMS

Event #

Description

796

DN8 HEV 12V LITHIUM BATTERY OVER VOLTAGE WARNING
LIGHT IMPROVEMENT (P1BB20)

1037

CN7 HEV 12V LITHIUM BATTERY OVER VOLTAGE WARNING
LIGHT IMPROVEMENT

NX4 HEV 12V LITHIUM BATTERY OVER VOLTAGE WARNING
LIGHT IMPROVEMENT
(*or use a later available event as listed in the GDS BMS Update screen if one is available.)
1038

Parts Information:
Model

Part Name

Elantra
Hybrid
(CN7 HEV)

Campaign
Sticker

Part Number

Figure

NP001-SC9B4

Apply to all
vehicles
regardless of
state

NP050-09006

Order only for
states:
CA, CO, CT,
DE, ME, MD,
MA, NJ, NY,
OR, PA, RI,
VT, WA

Sonata
Hybrid
(DN8 HEV)
Tucson
Hybrid
(NX4 HEV)

Vehicle Emission
Recall - Proof of
Correction Card

Remarks

Warranty Information:
Model

Op. Code

Operation

30D163R1

BMS Software
Update and
Campaign
Sticker
Application

Elantra Hybrid
(CN7 HEV)
Sonata Hybrid
(DN8 HEV)
Tucson Hybrid
(NX4 HEV)

Op. Time

Causal Part

Nature
Code

Cause
Code

I14

ZZ3

37513-BY000
0.4 M/H

37513-L7000
37513-P0000

NOTE 1: Submit claim on Claim Entry Screen as “Campaign” type.
NOTE 2: If a part is found in need of replacement while performing this campaign 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.
NOTE 3: Op times include VIN, Mileage, and photo capture of the “ECU update complete” screen as
outlined in the Digital Documentation Policy.

ROM ID Information: Event 796
Model

MY

System

ECU
Part Number

37513-L5000
Sonata
Hybrid
(DN8 HEV)

2020 - 2022

BMS

37513-L7000

ROM ID
Old
5000
5200
5400
5420
5440
5460
5480
5500
5600
5620
5640
5680

New

5520

5740

ROM ID Information: Event 1037
Model

MY

System

ECU
Part Number

Elantra
Hybrid
(CN7 HEV)

2021 - 2023

BMS

37513-BY000

ROM ID
Old
6000
6020
6040
6060

New
6080

ROM ID Information: Event 1038
Model

MY

System

ECU
Part Number

ROM ID
Old

New

6000
Tucson
Hybrid
(NX4 HEV)

6020
2022 – 2024

BMS

37513-P0000

6040
6060
6100

6120

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 OR place in Ready mode during update.

•

Do NOT turn OFF the ignition switch during update.

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 BMS
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.

4.

DIGITAL
DOCUMENTATION

Take a screenshot of the ECU update
complete screen using your tablet and
upload to STUI.

5.

After the ECU update process shows 100%
complete, cycle the ignition key to OFF for at
least 10 seconds to reset the control unit.

6.

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

7.

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

i

Information

For multiple ECU updates, go back to the
Auto Mode screen to view all updates
available in one screen.
8.

Proceed to Campaign Sticker Application
(for All Vehicles) on page 8.

NOTICE
If the ECU update fails in Auto Mode, perform the update in Manual Mode using the password(s)
below.
Manual Mode Password: Event # 796
ECM Menu

Password

DN8 HEV BMS 37513-L5000

5000

DN8 HEV BMS 37513-L7000

7000

Manual Mode Password: Event # 1037
ECM Menu

Password

CN7 HEV BMS 37513-BY000

7531

Manual Mode Password: Event # 1038
ECM Menu

Password

NX4 HEV BMS 37513-P0000

3000

Campaign Sticker Application (for All Vehicles)
1.

Fill in the Dealer Code and Date on the
Campaign Sticker, and apply adjacent to the
existing Emission Label, on the underside of
the hood, as shown.
Be sure to clean the mounting surface to
ensure proper label adhesion.

2.

DIGITAL
DOCUMENTATION

Using STUI, take a clear photo of the
campaign sticker along with the last 6
digits of the VIN and the date of repair
on a piece of paper.
Upload the photo to STUI.

3.

Proceed to next section and complete the
Vehicle Emission Recall - Proof of
Correction Card for the states listed.
If NOT applicable to your state, the repair
process is complete.

DN8 HEV
(Example)

Vehicle Emission Recall – Proof of Correction Card (for Vehicles Registered in Certain States)
For vehicles registered in California, Colorado, Connecticut, Delaware, Maine, Maryland,
Massachusetts, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont, and
Washington:
VEHICLE EMISSION RECALL - PROOF OF CORRECTION CARD
A Vehicle Emission Recall - Proof of Correction card must be filled out for all vehicles registered in
California, Colorado, Connecticut, Delaware, Maine, Maryland, Massachusetts, New Jersey, New
York, Oregon, Pennsylvania, Rhode Island, Vermont, and Washington. Residents of these states,
who own an affected vehicle, will be required to possess a Vehicle Emission Recall - Proof of
Correction card as evidence of voluntary service campaign completion, when they apply for vehicle
registration renewal.
WHAT TO DO WITH THE CARD:
The Vehicle Emission Recall - Proof of Correction card must be completed by the Dealership’s
Service Manager using a permanent ink pen. A fine point pen is recommended. When filling in the
information, copy the information directly from the vehicle, not from the repair order.
ALL INFORMATION MUST BE PRINTED AND NEAT.
The copy of the card shown below indicates the areas to be filled in. Each area must be filled in.
The completely filled out Vehicle Emission Recall - Proof of Correction card should be given
to the owner of the vehicle upon completion of the Campaign.
1.
2.
3.
4.
5.
6.

7. Enter Dealership Name
8. Enter Dealership’s Address
NOTE: Enter the physical address, not the
mailing address (not a P.O. Box)
9. Enter Date of Repair
10. Service Manager Sign Here

Enter Vehicle’s License Number
Enter “Hyundai”
Enter Model Year
Enter Model (e.g. Elantra Hybrid)
Enter the vehicle’s VIN Number
Enter Campaign Number 9B4

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