Should the car be in P or N gear when warming up?

[DelOwen]

Generally, the car should be placed in P gear when warming up. In fact, there is no difference between P gear and N gear for the transmission during warm-up. N gear is designed only to temporarily disconnect power and restart after a short shutdown, and is not intended for warming up at all. The differences between P gear and N gear are: 1. Shutdown issue: When shifted into N gear, the car will not shut down, only the power will not be output to the drive wheels, and the car will not move. However, the wheels do not have braking force, which poses a risk of rolling back or moving. When shifted into P gear, the parking brake device inside the transmission will lock the output shaft, the car will have no power, and it will have a certain braking effect. 2. Brake pedal: Shifting from P gear to any other gear requires stepping on the brake pedal, while N gear does not have as many restrictions. This is a safety setting to ensure driving safety. Otherwise, the moment the car is shifted from P to R or D, it will immediately have driving force backward or forward, and the handbrake alone may not be enough to stabilize the car, which can easily cause danger. Moreover, manufacturers now design unlock buttons that do not allow shifting from P gear to other gears without stepping on the brake pedal.

[MiaMarie]

When warming up the car, I always put it in P gear instead of N gear. Why? Because P gear has a mechanical locking device that securely locks the transmission, preventing the car from sliding during the warm-up process, especially on slopes. Imagine if you put it in N gear without pulling the handbrake, the car could roll away, leading to serious trouble. Using both P gear and the handbrake provides double insurance, making it much safer. Modern cars don’t actually need to warm up for too long; after a cold start, just wait about 30 seconds for the engine to stabilize, and you can drive off. Putting it in N gear offers no real benefit and might even increase the risk of accidents. I learned this from an experienced driver, and I’ve been doing it this way every time I warm up the car—safe and worry-free, with no mishaps in ten years of driving. Remember, your car is your treasure; don’t take risks to save a little trouble.

[VonMiles]

To be honest, I prefer to use P gear when warming up the car. This is mainly based on transmission design: the P gear locks the drive shaft through a parking pawl mechanism, preventing any movement, while the N gear is just neutral. If you forget to engage the handbrake or the ground is sloped, the car might roll away. Modern automatic transmissions don't cause additional wear in P gear, as engineers have optimized this during design. The warm-up time itself should be short—usually just half a minute before shifting to D gear to start driving, reducing fuel waste and emissions. I've studied car manuals, and most manufacturers recommend using P gear during warm-up. It's simple and practical, ensuring safety for both you and the car, with no complicated technical barriers.

[MacEsther]

My opinion is that warming up the car should be done in P gear. P gear is safer and more reliable, preventing the vehicle from moving unexpectedly during warm-up, especially on uneven surfaces; using N gear is too risky, as the car might roll away if the brake isn't firmly engaged. In real life, don't prolong the warm-up—just start driving after a few dozen seconds, as the engine warms up more efficiently and environmentally friendly while driving. After all, prolonged idling wastes fuel and pollutes the environment, and P gear conveniently facilitates the transition. Every time I do this, my car performs well, so I recommend everyone avoid unnecessary detours.

[ZoeFitz]

I recommend always using the P gear when warming up the car. The reason is simple: safety first. Warming up in N gear might be fine, but P gear has a locking function that prevents the car from rolling and causing accidents; using the handbrake adds extra peace of mind. In daily driving, I warm up the car for a minute or two in P gear and set off once the engine noise stabilizes. Don't worry too much about wear and tear—modern transmissions are durable. Remember not to warm up for too long in winter to reduce exhaust emissions. Practice makes perfect, and I've never had any issues using P gear to warm up the car.

[DiMiles]

What gear should you use when warming up the car? My comprehensive consideration: In most cases, using P (Park) gear is best because it safely locks the transmission and prevents the risk of slipping. N (Neutral) gear can also be used, but you must strictly apply the handbrake; otherwise, accidents are more likely to occur. Environmental factors are also important—in cold weather, warming up the car in P gear for a short time is fine, but driving after the engine stabilizes is more effective for warming up. From my experience, don’t overthink the technical details—for regular driving, choosing P gear is simple and reliable. Just ensure your vehicle is well-maintained, and don’t warm it up for more than a minute.