سقاطة الركن محمّلة على منحدر

The parking pawl under load because the vehicle was parked on a gradient without the handbrake. The vehicle's whole weight rests on the pawl, wedging it against the output gear so the actuator cannot withdraw it.

The complaint is a selector that will not leave park, which reads as a transmission failure and is not. The remedy is to relieve the load: chock the wheels, apply the parking brake, and rock the vehicle slightly — the pawl then releases normally. The habit that prevents it is applying the handbrake before selecting park, which is worth telling an owner who meets this repeatedly. A module reporting the pawl did not move is reporting the truth, so the sensor is not at fault and should not be replaced.