122-J6Q7Q-07

Advanced Technical Information
911 (991) Wheel Speed Sensor Faults
Vehicle Type:
911 (991)
Model Year:
2017
Customer
Concern:
911 (991)
1704 4511
Binder – 4 – Chassis
4
While driving the vehicle, these warning lights will illuminate in the instrument cluster:
• Parking Brake
• ABS
• PSM
The following warning messages are displayed in the TFT display:
• ABS/PSM failure, drive with caution
• Steering lock fault
• Parking brake fault
• Lane change assist currently unavailable
• Rear axle steering fault, drive with caution (if equipped)
Information:
It is possible, under certain driving conditions, that one wheel is not in contact with the ground. For example, exiting or entering a driveway where there is a difference in the slope of the two driving surfaces.
Due to the stiffness of the body, a wheel loses contact with the ground (typically on the front axle) and does
not spin. A fault is set for that wheel speed sensor, and subsequent warnings are illuminated.
Fault codes for the wheel speed sensors are:
004201 - Right Front Wheel Speed Sensor, Implausible Measured Values
004211 - Left Front Wheel Speed Sensor, Implausible Measured Values
004221 - Right Rear Wheel Speed Sensor, Implausible Measured Values
004231 - Left Rear Wheel Speed Sensor, Implausible Measured Values
The fault is not automatically cleared after a key cycle. It has to be cleared at the dealer.
©2017 Porsche Cars North America, Inc.
AfterSales
June 2, 2017
Page 1 of 2
4
Information for
Customer:
Information for
workshop:
Dealership
Distribution
Routing
911 (991)
4511 1704
Advanced Technical Information
The vehicle is operating as designed. It is possible to prevent this situation and keep all four wheels on the
ground by changing the approach angle between driving surfaces with different slopes.
A thorough visual inspection should be performed to rule out any other possible damages or defects. The
faults should be cleared and proper operation verified on a test drive. Please do not replace sensors at this
time.
Service Manager
________
Shop Foreman
________
Service Technician
________
________
________
________
Asst. Manager
________
Warranty Admin.
________
Service Technician
________
________
________
________
Dr. Ing. h.c. F. Porsche AG is the owner of numerous trademarks, both registered and unregistered, including without limitation the Porsche Crest®, Porsche®, Boxster®, Carrera®, Cayenne®, Cayman®,
Macan®, Panamera®, Speedster®, Spyder®, Tiptronic®, VarioCam®, PCM®, PDK®, 911®, RS®, 4S®, 718®, 918 Spyder®, FOUR UNCOMPROMISED®, and the model numbers and distinctive shapes of
the Porsche automobiles such as, the federally registered 911 and Boxster automobiles. The third party trademarks contained herein are the properties of their respective owners. Porsche Cars North America,
Inc. believes the specifications to be correct at the time of printing. However, specifications, standard equipment and options are subject to change without notice. Some options may be unavailable when a car
is built. Some vehicles may be shown with non-U.S. equipment. Please ask your authorized Porsche dealer for advice concerning the current availability of options and verify the optional equipment that you
ordered. Porsche recommends seat belt usage and observance of traffic laws at all times.
June 2, 2017
Page 2 of 2
AfterSales
©2017 Porsche Cars North America, Inc.