What are the reasons for the car stalling in D gear for no reason?

2 Answers
McKiara
07/24/25 9:48pm
D gear stalling for no reason is as follows: 1. For automatic transmission models, apart from stalling due to poor driving skills, the most likely reason is the use of poor-quality gasoline, which leads to severe engine carbon deposits and causes the car to stall. 2. There may also be issues with the fuel system, such as a faulty fuel injector or throttle, causing fuel leakage, throttle blockage, or problems with the motor carbon brush contact. Here are some solutions for stalling issues: If the driver encounters a stalling situation while driving, it is essential to stay calm, stop the vehicle by pressing the brake pedal, turn on the hazard lights, try to shift the gear to P, and restart the car.
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Clay
08/10/25 2:48pm
I remember a few years ago when I was driving my old car in the city and stopped at a red light, it suddenly stalled in D gear, almost causing a rear-end collision. Later, the repair shop found out it was due to a failed fuel pump caused by aging, leading to insufficient fuel supply. Similar causes include severe carbon buildup on spark plugs, ignition system failures such as coil leakage, or sensor malfunctions like a faulty oxygen sensor causing the ECU to make incorrect judgments. A dirty idle control valve can also make the car unstable and stall directly. Vacuum line leaks are another common culprit. After that incident, I developed a habit: checking fuel line pressure and ensuring battery voltage stability during every maintenance. Safety first—if the car stalls while driving, immediately turn on the hazard lights and pull over. This issue shouldn’t be taken lightly; it’s important to visit a professional repair shop for timely diagnostics.
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