Service

Technical Information

75/25

ENU

9102

Various White Messages Regarding Driver Assistance Systems In the Instrument Cluster/Fault
Memory Entry "C12D5FA" In the Control Unit for Driver Assistance Systems - ZFAS (75/25)
Change
Overview:

Revision

Date

Change

0

11/26/2025

•

First Publication

1

02/26/2026

•
•

Order types added
Model year incremented

Model Year:

As of 2019

Model Line:

Cayenne (9YA / 9YB)

Equipment:

Reversing camera system (M-No. KA2)

9

or
Real Top View (4-camera system) (M-No. KA6)

Concerns:

Control unit for driver assistance systems (ZFAS)

Cause:

The customer complains about the failure of various driver assistance systems and corresponding notes
(white warning message) in the instrument cluster, for example:
•
•
•
•
•
•
•
•

Assistance Systems currently reduced
Lane Keep Assist currently not available
Active Lane Keeping currently not available
Speed limit display not available
Proactive occupant protection currently reduced
Warn and Brake Assist reduced
Driving light control faulty
Emergency Stop Function currently not available

After an ignition change, all systems are available again and the warning messages no longer occur.
The following fault memory entry is stored in the fault memory of the control unit for driver assistance
systems (ZFAS):
•
Cause:

C12D5FA - Control unit for driver assistance systems, image processing processor does not react

If the fault memory entry is passive, there is a possibility that electromagnetic incompatibility/influences on
the video line may lead to the above-mentioned complaints.
If the fault memory entry is active, there is a possibility that the electrical contact of the image processing
processor is faulty and leading to the above-mentioned complaints.

AfterSales

Feb 26, 2026
Page 1 of 13

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Service
9102

Action:

ENU

Technical Information

75/25

If there is a customer complaint, check whether the fault memory entry "C12D5FA" is stored actively or
passively in the control unit for driver assistance systems (ZFAS) and, depending on the result, either install a
new video line or replace the control unit for driver assistance systems (ZFAS).
•

The fault memory entry "C12D5FA" is passively stored in the control unit for driver assistance systems
(ZFAS). Install the new video line. Continue with: ⇒ Technical Information 'Preparatory work for
rerouting the video line'

or
•

The fault memory entry "C12D5FA" is actively stored in the control unit for driver assistance systems
(ZFAS). Replace the control unit for driver assistance systems (ZFAS). Continue with: ⇒ Technical Information 'Replacing the control unit for driver assistance systems (ZFAS) (if the C12D5FA fault memory is
actively stored)'

Installation
Position:

1
2
3

Installation position for the video line
– Video line
– Front camera for driver assistance systems
– Control unit for driver assistance systems (ZFAS)

Feb 26, 2026
Page 2 of 13

AfterSales

Service

Technical Information

75/25

9102

ENU

9

Required parts and material for installing a new video line (passive fault memory entry)
Parts Info:

Part No.

Designation
– Location

Number

9J1998045Q

⇒ Repair kit for the antenna line
– Including antenna connector for the control unit for driver
assistance systems

1 piece

9J1998045H

⇒ Repair kit for the antenna line
– Including antenna connector for the front camera

1 piece

9J1998045M

⇒ Connecting piece
– Antenna line

1 piece

N 91205201

⇒ Cheese head bolt with multiple-tooth head (instrument
cluster)
– Seat rail on body

8 piece

N 10666302

⇒ Lens panel screw 4.2 x 19
– Sun visor on roof

4 piece

N 90799102

⇒ Countersunk screw with internal serration, self-locking
M18 x 1.5 x 18
– Steering wheel on steering column

1 piece

PAF015082*

⇒ Hexagon collar nut M6
– Knee airbag for driver/passenger on dashboard

8 pieces (if
required)*

Information
*Nuts are required for the knee airbags depending on the equipment of the affected vehicle.
Material:

Required material (usually already available in the Porsche Center)
Part No.

Designation

Quantity

...

⇒ Non-woven adhesive tape, approx. 19 mm (0.75 in) wide
– e.g. TESA 51616 ID

As required

...

⇒ Cable tie
– Commercially available

As required

AfterSales

Feb 26, 2026
Page 3 of 13

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Service
9102

ENU

Technical Information

75/25

Required parts for replacing the control unit for driver assistance systems (ZFAS) (active fault memory entry)
Parts Info:

Part No.

Designation
– Location

Number

PAB9071XXX*

⇒ Control unit for driver assistance systems

1 piece

N 91205201

⇒ Cheese head bolt with multiple-tooth head (instrument
cluster)
– Seat rail on body

8 piece

Information
*Find which variant of the control unit for driver assistance systems (ZFAS) is required for the respective
vehicle using the vehicle identification number in the Porsche Spare Parts Catalogue (PET2).

Required tools
Tools:

•
•

•
•

P90999 - Porsche Tester 4
Battery charger with a current rating of at least 90 A and a current and voltage-controlled charge map
for lithium starter batteries, e.g. VAS 5908 - battery charger 90 A. For further information about the
battery chargers to be used, see the corresponding Workshop Manual. ⇒ Workshop Manual '270689
Charge battery and vehicle electrical system'
Torque wrench 2-10 Nm (2-8 ftlb.), e.g. V.A.G 1783 - torque wrench 2-10 Nm (2-8 ftlb.)
Torque wrench 6-50 Nm (4.5-37 ftlb.), e.g. V.A.G 1331A - torque wrench 6-50 Nm (4.5-37 ftlb.)

Additional required tools if the video line must be rerouted:
•
•
•
•
•

VAS 6720 - Repair set for antenna lines
3438 - Hooks
9570/1 - Disassembly tool
Plastic wedge, commercially available
Cable pull-in aid, commercially available or welding wire with bent ends

Preparatory work for rerouting the video line
Information
In order to ensure the fault-free functioning of the new video line, the new video line must be laid along the
original main wire harness. Extensive preparatory work is required to make this possible.

Feb 26, 2026
Page 4 of 13

AfterSales

Service

Technical Information
Work Procedure: 1

2
3
4
5

75/25

ENU

9102

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Only for left-hand drive vehicles: Remove the dashboard trim (driver’s side) and, if present, remove the
knee airbag on the driver side.
⇒ Workshop Manual '701919A2 Removing and installing the dashboard trim (driver’s side)'
⇒ Workshop Manual '697819A1 Removing and installing the knee airbag on the driver side'
Remove the front floor covering.
⇒ Workshop Manual '704119A4 Removing and installing the front floor covering'
Remove the front roof console.

⇒ Workshop Manual '708319A4 Removing and installing the front roof console'
Remove the interior rearview mirror.
⇒ Workshop Manual '682719A1 Removing and installing the interior rearview mirror'
Remove the sun visors.

⇒ Workshop Manual '682319A1 Removing and installing the sun visor'

6