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Documents
Document name
master.xml

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Technical Service Bulletin
DTC P0B2500 logged within address 0021 (Battery Energy Control Module 2) - Dynamic ride system warning
visible

Transaction No.: 2068946/9
Release date: Feb 21, 2025

Condition
Customer statement:
Bentley dynamic ride system fault is displayed within the Drivers Instrument Panel (DIP)
Workshop findings:
DTC P0B2500 - Hybrid/EV Battery "A" Voltage low is stored within address 21- Battery Energy Control Module 2

Technical Background
Possible internal fault with the super capacitor
•

In the event that DTC P0B2500 is evident the operative must follow the steps within the Measure section to completion

NOTICE
Note for vehicles with DTC P0B2500 evident:
The instructions within the Measure section must be conducted to completion regardless of vehicle status (PDI or post vehicle handover) Do Not
erase the DTC and handover the vehicle back to the customer as DTC P0B2500 could return
Revision history - 2068946/8
•

Warranty data has been amended

Production Solution
Not applicable

Service
WARNING
This vehicle uses a 48 volt system, please refer to "48 volt system - safety precautions" before working on the 48 volt
system
1) Referring to Rep.Gr 27 - Deactivate the 48 volt system - Refer to 48 volt system - To activate and deactivate
2) Referring to Rep.Gr 27 - Check the security of the super capacitor positive and negative terminals (Figure 1) as follows:
•

Remove the caps (A) from the terminals

•

Check the security of the positive and negative terminals (B) are as described within Rep.Gr 27

•

In the event that one or both terminals were not tightened to the correct torque as Rep.Gr 27, the operative must tighten the terminal(s) to
the correct torque as detailed within Rep.Gr 27 - Super capacitor

NOTICE
In the event one or both terminals required tightening to the correct torque (found to be not initially secure) the operative
must feedback the findings via DISS

Figure 1
3) Referring to Figure 2 - Check the security of the harness connector
•

In the event the harness connector is not secure the operative must secure the connector

NOTICE
Should an issue be identified with the connector or super capacitor which doesn’t allow the connector to be secured the
operative must feedback via DISS

Figure 2
4) Referring to Rep.Gr 27 - Activate the 48 volt system. Refer to 48 volt system - To activate and deactivate
5) In the event the super capacitor positive and / or negative terminals r equired tightening to the correct torque the operative must conduct
steps 6,7 and 8
However
In the event the super capacitor positive and / or negative terminals were already at the correct torque the operative must conduct steps 7
and 8
6) Conduct a short road test
NOTICE
A road test should only be conducted if the super capacitor positive and / or negative terminals required tightening to the
correct torque
7) Read the following MVB’s to check the difference between the highest cell voltage and the lowest cell voltage (Figure 3)
21-Battery Energy Control Module 2 -→ MVB -→ IDE08217 and IDE8218

Figure 3
8) If there is a difference of 0.5v or more between the highest cell voltage and lowest cell voltage and the fault code ‘ P0B2500: Hybrid/EV
Battery "A" Voltage low' is stored in address 21-Battery Energy Control Module 2 - Referring to the applicable Rep.Gr 27 - Replace
the super capacitor

Warranty
Warranty type 110 or 910
Damage service number 93 03
Damage code 00 40

Bentayga
Activate and deactivate the 48 volt system (Step 1 and 4)
93 10 00 00 - 30 TU (Use 99 index until 25/07/24)
Time to conduct steps 2,3,5 and 7
93 50 19 00 - 20 TU
Diagnosis time
01 50 00 00 as per ODIS log (Must not exceed - 10 TU)
Time to conduct a short road test (Step 6)
Labour Operation Code 01 21 00 01 - 30 TU
Time to replace the super capacitor (if required - Step 8)
Labour Operation Code 93 50 19 00 - 20 TU
NOTICE
A road test should only be conducted if the super capacitor positive and / or negative terminals required tightening to the
correct torque

New Flying Spur and New Continental GT
Activate and deactivate the 48 volt system (Step 1 and 4)
93 10 00 00 - 30 TU (Use 99 index until 25/07/24)
Time to conduct steps 2,3,5 and 7
93 50 19 00 - 40 TU
Diagnosis time
01 50 00 00 as per ODIS log (Must not exceed - 10 TU)
Time to conduct a short road test (Step 6)
Labour Operation Code 01 21 00 01 - 30 TU
Time to replace the super capacitor (if required - Step 8)
Labour Operation Code 93 50 19 00 - 40 TU

New Continental GTC
Activate and deactivate the 48 volt system (Step 1 and 4)
93 10 00 00 - 30 TU (Use 99 index until 25/07/24)
Time to conduct steps 2,3,5 and 7
93 50 19 00 - 40 TU
Diagnosis time
01 50 00 00 as per ODIS log (Must not exceed - 10 TU)
Time to conduct a short road test (Step 6)
Labour Operation Code 01 21 00 01 - 30 TU
Time to replace the super capacitor (if required - Step 8)
Labour Operation Code 93 50 19 00 - 50 TU

NOTICE
A road test should only be conducted if the super capacitor positive and / or negative terminals required tightening to the
correct torque

Required Parts and Tools
Refer to the ETKA parts catalogue