What is the Porsche ABS/PSM malfunction?

[River]

Porsche PSM malfunction refers to a fault in the Porsche Stability Management (PSM) system. This system utilizes multiple sensors to monitor real-time data such as driving direction, speed, yaw rate, and lateral acceleration, then calculates the vehicle's actual driving direction accordingly. A constantly illuminated ABS light indicates an alert in the Anti-lock Braking System. More details about ABS are as follows: 1. ABS light briefly illuminates for a few seconds when starting the vehicle: The light turns on when the ignition is switched on or the engine is started, as the system undergoes an automatic self-check. The light will turn off once the check is completed. 2. ABS activates when the brake pedal is rapidly pressed to the floor: During emergency braking situations, the Anti-lock Braking System prevents wheel lock-up, thereby improving safety during sudden braking. 3. ABS malfunction light remains constantly illuminated: If the vehicle can still rely on conventional braking while driving, but the ABS warning light stays on, it indicates a fault in the ABS system. Professional diagnosis using specialized equipment is recommended to determine whether the issue lies with the tone wheel, sensors, wiring, or other components.