No. 2108

9
Bulletin #: 2108
Advanced Technical Information
Part ID: 9170
992, 9YA, 9YB, Y1A Lane Change Assist Warning Present with Fault Codes B200FF9,
U112300
Vehicles Affected
Models
Model Year
Model Type
VIN Range
Vehicle-Specific Equipment
911 Carrera
As of 2020 up to 2021
992
N/A
N/A
Cayenne
As of 2019 up to 2021
9YA/ 9YB
N/A
N/A
Taycan
As of 2020 up to 2021
Y1A
N/A
N/A
Revision History
Revision
Release Date
Changes
0
May 7, 2021
Original document
Condition
The customer observes an intermittent warning for lane change assist. The workshop confirms that this warning
appears and finds the fault codes below in the right, the left, or both Lane Change Assist ECUs.
Fault Codes
B200FF9 - Control unit, faulty (140151 or similar fault ID)
U112300 - Data bus – fault received (fault ID 123012)
This failure condition can occur on customer cars and even on new vehicles at PDI.
Technical Background
Porsche is working to root cause this issue. We will make more information available when possible.
AfterSales
May 7, 2021
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Bulletin #: 2108
Advanced Technical Information
Part ID: 9170
9
Service Information
Lane Change Assist calibration is ineffective. During a subsequent drive, the warning will return.
Parts exchange is also ineffective. Do not exchange parts.
The failure is temporary. Lane Change Assist functionality will return. The fault typically ‘self-heals’ in less than one 		
minute, even without a key cycle. However, the failure will continue to reoccur intermittently.
Search Items
LCA, function restriction, blind spot
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.
©2021 Porsche Cars North America, Inc.
AfterSales
May 7, 2021
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