TSB: Porsche False DTCs

This bulletin applies to 2019 Porsche 718 Boxtser vehicles. Parking Brake, ABS and PSM waring lights may illuminate in the instrument cluster.  

The following warning messages may be 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)
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 surfaces. Due to body stiffness, a wheel may lose contact with the ground (typically front axle) and does not spin. A fault is set for that wheel speed sensor, causing the warnings.

Fault codes for the wheel speed sensors are:

-    004201 (right front when 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 value)

Note: the fault is not automatically cleared after a key cycle. It must be cleared at the shop.