Can the car be turned off without shifting to P gear?

[MichaelFitz]

No, the car cannot be turned off without shifting to P gear. The consequences of turning off an automatic transmission car without shifting to P gear are engine damage and the inability to remove the key. The key can only be removed and the engine turned off after shifting back to P gear. The P gear in an automatic transmission is also called the parking gear or starting gear. When the car is parked with the gear in this position, the wheels are mechanically locked to prevent rolling. It uses a mechanical device to lock the rotating parts of the car, preventing movement. When the car needs to stay in a fixed position for a long time, after parking, the handbrake should be engaged and the gear lever should be pushed into the P position before leaving the vehicle. Both P gear and N gear are neutral gears, but the difference is: P gear has a mechanical braking device, so the car will not move once the gear grooves in the transmission are locked by the pawl; N gear itself does not have any wheel locking device, requiring the use of the handbrake or brake pedal to lock the wheels.

[MacLucia]

Once when I was driving my friend's new SUV, I turned off the ignition while still in D gear out of habit when getting out of the car. The vehicle suddenly shook violently and beeped an alarm, which gave me quite a scare. Actually, most modern automatic transmission vehicles allow forced engine shutdown, but alarms will trigger if not in P gear. This is because the transmission parking pawl hasn't engaged with the gear slot. If parked on a slope in this condition, the vehicle could roll. I once saw at a repair shop where a customer's car rolled half a meter after being shut down in N gear, hitting a tool rack. So even if manufacturers design vehicles to allow shutdown in non-P gears, it's best to develop the habit of shifting to P gear, engaging the parking brake, and then turning off the ignition - this protects both the transmission gears and parking lock mechanism.

[VanElisa]

Speaking of this, I once disassembled the transmission during a repair. The P (Park) gear essentially uses a metal hook to lock the output shaft gear. If you turn off the engine without shifting to P, the hook won't engage properly, meaning it's effectively unlocked. Modern cars like the Toyota RAV4 have extremely sensitive onboard computers—if the gear isn't in P when you remove the key, the horn will beep three times and the dashboard will flash warning lights like crazy. However, older American models like the Ford Explorer are more lenient; they won't make a peep even if you turn off the engine in N (Neutral). Regardless, doing this long-term will prematurely wear out the transmission's parking pawl. Fixing it requires dismantling the entire transmission, and the labor cost alone could buy you four new tires.

[HarrisonMarie]

My eight-year-old Honda Odyssey is quite particular. Last time when my wife was dropping the kids off at their extracurricular classes, she turned off the engine in D gear in a hurry. As a result, the anti-theft system locked the steering wheel immediately, and the dashboard displayed a transmission fault code when trying to restart. It took us quite a while to get it back to normal. The mechanic mentioned that newer energy vehicles are even stricter—for instance, with range-extended EVs like the Li ONE, you can't even unplug the charging cable unless it's in P gear. Actually, these restrictions implemented by car designers are meant to prevent accidents caused by forgetting to shift gears, especially rollaway incidents. Particularly on slopes like those in underground mall parking lots, a two-ton vehicle rolling away after being turned off without shifting to P gear is far more terrifying than a runaway supermarket cart.

[CooperMarie]

It depends on what car you're driving. For regular sedans like the Sylphy or Corolla, stalling in D gear at most triggers a warning light on the dashboard. But the pickup truck I drove at the construction site was particularly interesting—after stalling in N gear, the transmission oil pressure dropped rapidly, and when restarting, you could clearly feel the gearshift lever sticking. Old Zhang, the mechanic, said that vehicles frequently hauling loads have transmissions under greater stress, and long-term incorrect operation can easily damage the torque converter. Once at a car wash, I saw a Range Rover owner using the auto start-stop function while parked on a slope. The moment the engine restarted with the gear in D, the car lurched forward and sucked the water hose right under the chassis.

[WilliamLynn]

The three-step mantra repeatedly emphasized by driving instructors when teaching automatic transmission: Step on the brake → Shift to P gear → Pull the handbrake → Turn off the engine. My neighbor, a novice driver, always took shortcuts by turning off the engine in N gear for convenience. Once, while taking a ticket in the underground garage, the car suddenly rolled forward and nearly hit the toll booth. Later, an inspection revealed that his frequent practice of turning off the engine in N gear had caused wear on the hydraulic valve spool in the transmission valve body, costing over three thousand to replace. Nowadays, new cars are smarter; for instance, the Mercedes-Benz E-Class will automatically switch to park if you open the door while the gear is not in P. But ultimately, cars serve people. Developing correct operating habits not only extends the lifespan of parts but also avoids safety hazards.