NHTSA ID Number: 11021623
Manufacturer Communication Number: No. 2420.1
TSB/Document Date: 2025-08-06
Summary
Instructions on advanced technical information for the Taycan - 11kw OBC: active fault memory entry P31EF00 cannot be deleted.
2
Bulletin #: 2420.1
Advanced Technical Information
Part ID: 2797
Taycan (J1 PA) – 11 kW OBC: Active Fault Memory Entry P31EF00 cannot be Deleted
Vehicles Affected
Models
Model Year
Model Type
VIN Range
Vehicle-Specific Equipment
Taycan
2025
Y1A, Y1B, Y1C
N/A
11kW OBC (KB3)
Revision History
Revision
Release Date
Changes
0
July 5, 2024
Original document
1
July 16, 2025
Update to Service Information & Warranty section
Condition
In the fault memory of the high-voltage charger (On Board Charger - OBC), the following fault memory entry is
stored as “active”. The fault memory entry cannot be deleted even though there is no error symptom. This occurs in
conjunction with OBC software version 3018.
Control unit: High Voltage Charger (OBC)
P31EF00 Line conductor energy throughput - difference too high (E101E0)
Technical Background
Root cause analysis from PAG has confirmed the fault sets without any known function restrictions.
Service Information
In this case, please perform an AC charging process. If there is no complaint during AC charging, the error code can
be ignored for further diagnosis
Replacing the 11-kW high-voltage charger (On Board Charger - OBC) is not necessary and is not expedient.
The update of the guided fault finding (GFF) is available with Tester release 42.800.000.
AfterSales
July 16, 2025
Page 1 of 2
Bulletin #: 2420.1
Advanced Technical Information
Part ID: 2797
2
A software update to prevent this condition is available via Automatic programming of the High-voltage AC charger
control unit.
Warranty
For documentation and warranty invoicing, enter the working position and PCSS encryption specified below in the
warranty claim:
APOS
Labor operation
I No.
03350050
On board diagnostic
KB3
03350053
On board diagnostic-Create VAL
KB3
27972550
High-voltage charger program
KB3
Location (FES5)
27970
High-voltage charger
Damage type (SA4)
1614
Function not as specified
PCSS encryption:
Search Items
Taycan, OBC, 11kW, HV Charger, P31EF00, 3018, Line conductor energy throughput, AC Charging
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.
E18378
©2025 Porsche Cars North America, Inc.
AfterSales
July 16, 2025
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TSB/Document ID: No. 2420.1
Replacement Service Bulletin Number:
MFR Communication Date: 2025-07-16
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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