No. 28-23

Service
Technical Information
28/23
ENU
2470
2
Complaint - Check Engine Warning Light Active in Conjunction with Fault Memory Entry
“P2D8F00, P168D00” and/or “P25AC00” in the DME Control Unit (28/23)
Revision:
This bulletin replaces bulletin Group 2 28/23, dated May 30, 2023.
Model Year:
As of 2019 up to 2023
Vehicle Type:
Cayenne (9YA) / Cayenne S (9YA) / Cayenne Coupé (9YB) / Cayenne S Coupé (9YB) /
Cayenne E-Hybrid (9YA) / Cayenne E-Hybrid Coupé (9YB)
Concerns:
DME control unit
Cause:
The “Engine control fault” warning message will be displayed in the instrument cluster.
One or multiple of the following fault memory entries is stored in the DME control unit fault memory:
•
•
•
Action:
P2D8F00 - Oil pressure switch – signal implausible (0048AE)
P168D00 - Oil pressure switch - Signal implausible (0048AC)
P25AC00 - Oil pressure switch – signal implausible (0048AC)
In the event of a customer complaint, re-program the engine electronics (DME) control unit using the
latest PIWIS Tester.
Information
The minimum coding requirement is the PIWIS Tester software version 41.750.050
Information
Replacing the oil pressure switch is not effective for this error pattern.
Required tools
Tools:
•
•
P90999 - PIWIS Tester 4
Battery charger with a current rating of at least 90 A, e.g. VAS 5908 battery charger 90A. For
further information about the battery chargers to be used, see the corresponding Workshop Manual.
 Workshop Manual '270689 Charging vehicle electrical system and battery'
Re-program engine electronics (DME) control unit
Work Procedure: 1
The basic work procedure for programming a control unit is described in the Workshop Manual 
Workshop Manual '9X00IN Basic instructions and procedure for control unit programming using the
PIWIS Tester - section on “Programming”'.
Specific information on control unit programming in the context of this Technical Information:
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Technical Information
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Required PIWIS Tester software version:
41.750.050 (or higher)
Type of control unit programming:
Control unit programming using the ‘Automatic
programming’ function of the DME control unit.
‘Engine electronics (DME)’ control unit –
‘Coding/programming’ menu – ‘Automatic
programming’ function.
Read and follow the information and instructions
on the PIWIS Tester during the guided
programming sequence.
During programming, the DME control unit is
re-programmed and then automaticallyrecoded.
Programming sequence:
Do not interrupt programming and coding.
Once the control units have been programmed and
coded, you will be prompted to switch the ignition off
and then back on again after a certain waiting time.
Backup documentation of the new software versions
is then performed.
2
Programming time (approx.):
Programming takes up to 15 minutes, depending
on equipment.
Data set for the motor electronics (DME)
programmed as part of this programming:
See section  Technical Information '9X00IN
Overview of programmed DME data sets'.
Procedure in the event of error messages
appearing during the programming
sequence:
 Workshop Manual '9X00IN Basic instructions and
Procedure in the event of a termination in
the control unit programming:
Repeat control unit programming by restarting
programming.
procedure for control unit programming using the
PIWIS Tester - section on “Troubleshooting”'.
Carry out general reworking for control unit programming as described in  Workshop Manual
'9X00IN Basic instructions and work procedure for control unit programming using the PIWIS Tester Reworking section'.
Overview of programmed DME data records
Overview:
Information
The software part number and software version of the programmed data record are based on the
specified PIWIS Tester test software version. Please note that this may be different in a higher version.
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Service
Technical Information
28/23
ENU
2470
2
Cayenne (9YA) / Cayenne Coupé (9YB)
•
Model year
Exhaust
emission
standard
Porsche part number
(software)
Software
version
2020
(L)
2021
(M)
2022
(N)
2023
(P)
EU 6 AP
—
X
X
X
9Y0907559AD
0001
ULEV
—
—
X
—
9Y0907559AF
0001
C6b
X
X
X
—
9Y0907559F
0004
Porsche part number
(software)
Software
version
Cayenne S (9YA) / Cayenne S Coupé (9YB)
•
Model year
Exhaust
emission
standard
2020
(L)
2021
(M)
2022
(N)
2023
(P)
EU 6 AP
—
X
X
X
9Y0907551P
0002
ULEV
—
—
X
—
9Y0907551Q
0001
C6b
X
X
X
—
9Y0907551H
0004
Cayenne E-Hybrid (9YA) / Cayenne E-Hybrid Coupé (9YB)
•
Model year
Exhaust
emission
standard
2019
(K)
Software version
9Y0907559J
0003
2020
(L)
X
EU 6 DG
Porsche part number (software)
X
Working position and PCSS encryption
Labor position:
APOS
Labor operation
24702505
Programming DME control units
I No.
PCSS encryption:
Location (FES5)
24700
DME control unit
Damage type (SA4)
1134
programming error
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Technical Information
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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.
© 2023 Porsche Cars North America, Inc.
Sep 25, 2023
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AfterSales