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Does stepping on the accelerator in P gear have any impact?

1 Answers

ElliottLee

07/29/25 10:53am

Stepping on the accelerator in P gear has no impact on the vehicle. The P gear in an automatic transmission vehicle is the parking gear. In this gear, pressing the accelerator does not transfer power to the transmission system, meaning no substantial damage is involved. It is similar to stepping on the accelerator in neutral, where the engine operates in an idle state. When the vehicle is parked in P gear, the mechanical lock gear teeth secure the transmission output, effectively disengaging the engine from the transmission. There is no power transfer, and revving the engine only increases its RPM without transmitting power to the transmission. Like neutral (N gear), the engine spins freely, and the vehicle does not move. P gear is a special neutral position that mechanically locks the transmission output shaft to immobilize the vehicle. Its primary function is to act as a parking brake, preventing the vehicle from moving. For practical safety reasons, car manufacturers place the P gear in the first position on the gear selector and configure internal mechanisms to ensure the ignition key can only be removed when the gear lever is in P gear. Therefore, P gear is specifically designed for long-term parking in automatic transmission vehicles. Occasionally stepping on the accelerator in P gear will not harm the vehicle, but prolonged operation can cause the engine temperature to rise rapidly. Without cool air intake, the radiator's cooling efficiency significantly decreases, potentially leading to severe issues such as burning the piston's bearings (big and small ends). Additionally, it can negatively affect belts and gears.

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