NHTSA ID Number: 11028573
Manufacturer Communication Number: No. 36-21-2
TSB/Document Date: 2026-02-06
Summary
Technical information for Complaint – Charging Process is Cancelled / Check Engine Warning Light is Active: Replace High-Voltage Charger
Service
Technical Information
36/21
ENU
2797
Complaint – Charging Process is Cancelled / Check Engine Warning Light is Active: Re-Program
High-Voltage Charger (OBC) Control Unit (36/21)
2
Change overview
Version
Date
Change
0
03/19/2021
•
First publication with interim solution so that the fault
memory can be erased
1
09/03/2021
•
Adaptation of the required Porsche
Tester software version
for carrying out control unit programming
2
01/27/2026
•
•
Target software and Porsche Tester software release adapted
Update of Action
Vehicle Type:
Cayenne E-Hybrid (9YA/9YB)
Cayenne Turbo S E-Hybrid (9YA, 9YB)
Model Year:
As of 2019 up to 2021
Concerns:
High-voltage charger 3.6 kW (M no. KB1) — (OBC) control unit
Information:
Charging process of the high-voltage battery is cancelled and the Check Engine warning light comes on in
the instrument cluster. In many cases, it may be possible to continue charging the vehicle once the vehicle
plug has been disconnected and then re-connected to the vehicle.
This fault is caused by voltage fluctuations in the supply network (e.g. the domestic connection) to which the
high-voltage battery charger is connected.
The entry 'B200000 – Control unit, function restriction (E10105)' is stored in the fault memory of the
high-voltage charger (OBC) control unit as an active fault memory entry, which cannot be deleted initially. As
a result, the Check Engine warning light is not deactivated.
Action:
In the event of a customer complaint, re-program the high-voltage charger (OBC) control unit using the
relevant programming code.
Information
•
Control unit programming sets the fault memory entry 'B200000 – Control unit, function restriction
(E10105)' to passive, which can then be deleted.
•
Replacing the control unit will not correct the problem because the parts that are currently available use
the same software as the control unit that was the object of the complaint.
AfterSales
Jan 27, 2026
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Service
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ENU
Technical Information
36/21
Required tools
Information
The Cayenne is equipped as standard with a lithium starter battery, which must only be charged using
suitable battery chargers.
For further information about the battery chargers to be used, see:
Tools:
•
⇒ Workshop Manual '2706IN General information on the 12-volt lithium-ion battery'
•
⇒ Workshop Manual '270689 Charging vehicle electrical system battery'
•
Battery charger with a current rating of at least 90 A and - if required - also with a current and voltage
controlled charge map for lithium starter batteries, e.g. VAS 5908 90 A battery charger
P90999 - P90999 - Porsche Tester 4 with Porsche Tester test software release 43.800.000 (or higher)
installed
•
Preparatory work
WARNING
Electrically moved side windows and rear spoiler
•
Danger of limbs being trapped or severed
•
Risk of damage to components
Þ
⇒
Do not reach into the danger area.
Þ
⇒
Keep third parties away from the danger area.
Þ
⇒
Do not move components or tools into the danger area.
Þ
⇒
Retract roll-up sun blinds on the rear side windows before starting programming or coding.
NOTICE
Fault entry in the fault memory and control unit programming aborted due to undervoltage.
•
Increased current draw during diagnosis or control unit programming can cause a drop in voltage, which can result in
one or more fault entries and the abnormal termination of the programming process.
Þ
⇒
Before getting started, connect a suitable battery charger with a current rating of at least 90 A to the jump-start
terminals in the engine compartment.
NOTICE
Control unit programming will be aborted if the WiFi connection is unstable.
•
An unstable WiFi connection can interrupt communication between the Porsche Tester and the vehicle communication
module (VCI). As a result, control unit programming may be aborted.
⇒
During control unit programming, always connect the Porsche Tester to the vehicle communication module (VCI) via the
USB cable.
Jan 27, 2026
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AfterSales
Service
Technical Information
36/21
ENU
2797
2
NOTICE
Control unit programming will be aborted if the vehicle key is not recognized.
•
If the driver's key is not recognized in the vehicle, programming cannot be started or will be interrupted.
Þ
⇒
Place the driver's key with the back facing down into the front left storage compartment in the center console to
guarantee a continuous radio link between the vehicle and the driver's key.
Work Procedure: 1
2
Position the driver key in the rear area of the left
cupholder in the center console between the holding
struts (emergency start tray) in order to guarantee a
permanent radio link between the vehicle and driver key
⇒ Emergency start tray.
Carry out general preliminary work for control unit
programming as described in ⇒ Workshop Manual
'9X00IN Basic instructions and procedure for control
unit programming - section on "Preliminary work"'.
Emergency start tray
Re-program high-voltage charger (OBC) control unit
Information
The total time required for control unit programming is approx. 4 minutes.
1
The basic procedure for programming a control unit is described in the Workshop Manual ⇒
Workshop Manual '9X00IN Basic instructions and procedure for control unit programming - section on
"Programming"'.
Specific information on control unit programming in the context of this Technical Information:
Required Porsche Tester test software release:
43.800.000 (or higher)
Type of control unit programming:
Control unit programming using the ‘Campaign’ function
in the Additional menu on the Porsche Tester by entering
a programming code.
Programming code:
V5P7S
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Programming sequence:
Read and follow the information and instructions on
the Porsche Tester during the guided programming
sequence.
During programming, the high-voltage charger (OBC)
control unit is re-programmed and then re-coded automatically.
Do not interrupt programming.
Programming time (approx):
4 minutes
Software part number and software release
programmed during this campaign:
See section: ⇒ Technical Information '9X00IN Overview
of the programmed software versions'
The software release information in the
programmed data record is based on the
specified Porsche Tester test software release.
Please note that this may be different in a
higher release.
Following control unit programming, the software
part number and software release can be read out of
the "High-voltage charger" control unit (OBC) in the
'Extended identification' menu using the Porsche Tester.
Procedure in the event of error messages
appearing during the programming sequence:
⇒ Workshop Manual '9X00IN Basic instructions and
Procedure in the event of abnormal termination of control unit programming:
Repeat control unit programming by restarting
programming.
2
procedure for control unit programming - section on
"Troubleshooting"'.
Reading out and erasing fault memories.
Information
If control units are found to have faults that are not caused by control unit programming, these must
first be found and corrected.
Overview of hardware and software release
Software
Overview:
Hardware part
number of the
high-voltage
charger (OBC)
control unit
Model year of the
vehicle
Software part
number
Software release
before control unit
programming
Software release
after control unit
programming
5QE915682BE
K (2019)
5QE915682FB
6119
or
6127
L (2020)
Jan 27, 2026
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AfterSales
Service
Technical Information
36/21
2797
2
6123
M (2021)
5QE915682BF
ENU
M (2021)
5QE915682FA
6119
or
6123
6127
Follow-up actions
Work Procedure: 1
Carry out general rework for control unit programming as described in ⇒ Workshop Manual '9X00IN
Basic instructions and work procedure for control unit programming using the PIWIS Tester - “Rework”
section'.
2
Switch off ignition.
3
Disconnect the Porsche Tester from the vehicle.
4
Remove the driver's key from the emergency start tray.
5
Switch off and disconnect the battery charger.
Labor position and PCSS encryption
Labor positions:
APOS
Labor operation
I No.
27972590
Programming high-voltage charger
PCSS encryption:
Location (FES5)
27970
High-voltage charger
Damage type (SA4)
1612
does not function at times
References:
⇒ Workshop Manual '2706IN General information on the 12-volt lithium-ion battery'
⇒ Workshop Manual '270689 Charging battery/vehicle electrical system'
⇒ Workshop Manual '9X00IN Basic instructions and procedure for control unit programming using the PIWIS
Tester'
Important Notice: Technical Bulletins issued by Porsche Cars North America, Inc. are intended only for use by professional automotive technicians who have attended Porsche service training courses. They are
written to inform those technicians of conditions that may occur on some Porsche vehicles, or to provide information that could assist in the proper servicing of a vehicle. Porsche special tools may be necessary in
order to perform certain operations identified in these bulletins. Use of tools and procedures other than those Porsche recommends in these bulletins may be detrimental to the safe operation of your vehicle, and
may endanger the people working on it. Properly trained Porsche technicians have the equipment, tools, safety instructions, and know-how to do the job properly and safely. Part numbers listed in these bulletins
are for reference only. The work procedures updated electronically in the Porsche PIWIS diagnostic and testing device take precedence and, in the event of a discrepancy, the work procedures in the PIWIS Tester
are the ones that must be followed.
© 2026 Porsche Cars North America, Inc.
AfterSales
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TSB/Document ID: No. 36-21-2
Replacement Service Bulletin Number:
MFR Communication Date: 2026-01-28
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
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