No. 2226.1

9
Bulletin #: 2226.1
Advanced Technical Information
Part ID: 9152
992, 9YA, 95B PCM Restarts Unexpectedly – Software Fix Temporarily Unavailable
Vehicles Affected
Models
Model Year
Model Type
VIN Range
Vehicle-Specific Equipment
Macan
2019 - 2021
95B
n/a
n/a
Cayenne
2019 - 2021
9YA, 9YB
n/a
n/a
911
2020 - 2021
992
n/a
n/a
Revision History
Revision
Release Date
Changes
0
August 26, 2022
Original document
1
April 11, 2023
Update of Service Information
Condition
The customer reports the PCM continually and sporadically reboots. Sometimes, the screen freezes beforehand and
disallows inputs for a time, though audio playback continues. At other times, the screen may shut off and restart
suddenly and without warning.
The workshop confirms the customer complaint.
Technical Background
These failures are due to the PCM’s memory allocation. The PCM exceeds the allowed allocation for its navigation
system and overruns the computer memory, subsequently crashing the whole system. An upgrade of PCM software
to version 2865 will permanently solve the issue.
This fault is associated with vehicles that have Cluster 26 PCM software. Check the VAL to ensure this level of
software is present before proceeding.
AfterSales
Apr 11, 2023
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Bulletin #: 2226.1
Advanced Technical Information
Part ID: 9152
9
A note about ‘Cluster XX’ PCM software:
Often Porsche will refer to modern PCM software by its first two characters. These characters identify the family,
or cluster, of that software release. For example, Porsche may refer to PCM software version 2865 as cluster 28
(sometimes designated as CL28). The same would apply to software version 2893 and 2812. All are cluster 28 or
CL28. Software 3B05 is cluster 3B or CL3B.
Service Information
For 911 (MY20-21 992), Cayenne (MY19-21 9YA/B), and Macan II (MY19-21 95B), this software version 2865
is currently only available when installing a new PCM. As of August 19, 2022, this software is not yet available in the
PIWIS tester. Therefore, in confirmed cases, please order a new PCM and be sure to order the latest supersession. 		
(The new parts have cluster 28 software built in from the factory.)
Soon, the target software should be available in the PIWIS tester. When Porsche releases it, we will remove this ATI
and replace it with a new TI.
Warranty
As always, be sure to document the repair completely in PQIS. For this repair, please code the “cause” as follows:
Cause location:		
Cause symptom:
91100 Front PCM display and operator control unit
4096 Software cannot be installed/enabled
Also, select the relevant labor operation coding associated with the replacement. These will differ with each model
type.
Search Items
Reboot, reset, PCM, MIB, CL26, CL28
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.
6000012791
©2023 Porsche Cars North America, Inc.
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Apr 11, 2023
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