Why can't the automatic transmission shift out of P gear?

[DelAmy]

Automatic transmission P gear locking mechanism consists of a locking gear, a locking pin, and a set of action mechanisms. After shifting into P gear, the cable drives the connecting ball pin, at which point the working pin slides to engage the locking pawl with the parking gear, locking the vehicle's gear shift and preventing the shift lever from being pulled. Here are the relevant details: 1. Solution for the automatic transmission shift lever stuck in P gear: To shift to other gears, first start the vehicle and then shift into other gears; or depress the brake pedal and then switch gears. When parking, always ensure the vehicle is completely stopped before shifting into P gear to avoid this issue. 2. How the automatic transmission P gear works: When the shift lever is in P gear, the parking lock mechanism locks the transmission output shaft. In P gear, the drive shaft is partially locked inside the transmission, providing some braking force even without pressing the brake on flat ground.

[VanOlive]

I've been driving for over a decade and have seen many cars get stuck in Park (P) position. Most cases are caused by not pressing the brake pedal firmly enough, as modern automatic transmissions have safety lock mechanisms that require a full brake pedal depression to shift gears. Other possible reasons include the key not being turned to the ignition position or insufficient battery power affecting the electronic systems. Last time, my buddy's car had this issue - after inspection, it turned out to be a faulty brake light switch that prevented signal transmission, and replacing this small switch solved the problem. If you force the gear lever, you risk damaging transmission components. So first make sure the brake is fully depressed and the key is in the correct position, then try shifting a few more times. If it still doesn't work, never force it - immediately take it to a professional repair shop to check the gear mechanism or wiring issues. Safe driving should always be the top priority. Regular vehicle maintenance can help prevent such troubles.