What to Do If You Forget to Turn Off the Engine Overnight?

2 Answers
MargaretRose
07/24/25 4:38am
Forgetting to turn off the engine when parking means the car remains in a running state, which keeps it in a fuel injection mode. Here are the relevant details: 1. Carbon buildup: This can lead to carbon deposits, increased fuel consumption, and even forced engine shutdown. It also produces harmful gases inside the car. 2. Harmful gases: At idle, the concentration of hydrocarbons and carbon monoxide emitted by the vehicle is higher than under other conditions, posing significant health risks—much higher than usual. 3. Solution: Open the car windows, set the air circulation to external, and turn the fan to maximum to expel the harmful gases. Driving at high speeds can help clear out carbon deposits.
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ColtonLee
08/11/25 12:16am
Once when I returned from a business trip, I found my car had been running all night in the garage, and my heart skipped a beat. This was extremely dangerous because the engine produces large amounts of carbon monoxide in an enclosed space, which could potentially harm health. I immediately opened the door to ventilate for several minutes before daring to approach, and luckily, there was no unusual odor. After turning off the engine, I checked the fuel gauge and temperature—fortunately, it hadn't overheated, but half a tank of gas was wasted, which was heartbreaking. To prevent this from happening again, I installed a mobile app that reminds me to turn off the engine when exiting the car. I also recommend sticking a small note on your parking spot as a reminder. Safety is no small matter; negligence could lead to serious accidents. In short, if you forget to turn off the engine, ensure ventilation first before handling the situation, and developing regular habits is crucial. This incident taught me a lesson—I need to be extra careful with parking procedures from now on.
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