Why does an automatic transmission car stall while driving?

[DiEmilia]

Automatic transmission cars stall while driving due to the following reasons:1. Anti-theft system activation: The car's anti-theft system is triggered, locking the engine. Solution: Check if the car's anti-theft system is activated. 2. Switch issue: Faulty ignition switch. Solution: Inspect the ignition switch's operation. 3. Signal line issue: Damaged ignition module or faulty ignition reference signal line from the ignition module to the engine computer. Solution: Check the ignition module and signal line for faults. 4. Oil pressure issue: Low fuel pump pressure, leaking pipelines, insufficient power supply current, or damaged fuel pressure regulator. Solution: Inspect pipelines for leaks. 5. Engine issue: Carbon deposits in the engine. Solution: Clean the engine carbon deposits.

[Pedro]

I've experienced this situation before, where my automatic transmission car suddenly stalled on the highway, which was really terrifying. Later, it was found that the fuel pump was broken, causing fuel supply interruption and inability to ignite. Other common causes include severe carbon buildup or damage to the spark plugs, insufficient battery voltage to supply power, and sensor failures such as the crankshaft position sensor leading to system shutdown. Before driving each time, I make it a habit to check the oil and coolant levels to ensure they are not lacking, preventing engine overheating failures. Stalling while driving is very dangerous because it affects the brakes and power steering, so I recommend that once it happens, you should smoothly glide to the side of the road and turn on the hazard lights to seek help. Developing a habit of regular maintenance is crucial, such as changing the oil and cleaning the filters every five thousand kilometers, to reduce the occurrence of such problems.

[DiNatalie]

From my understanding, an automatic transmission car stalling while driving could be due to electrical issues, such as aging or damaged ignition coils, which prevent the spark plugs from properly igniting the air-fuel mixture. The fuel supply system is also critical; a clogged fuel filter or a faulty fuel pump can cause fuel delivery interruption. On the electrical side, if the alternator fails to charge, the battery may drain and cause the engine to stall. In modern cars, faulty sensors like the throttle position sensor can send incorrect signals to the ECU, leading to engine shutdown. If this happens, stay calm and try to coast to a safe spot for diagnosis. Always pay attention to dashboard warning lights while driving and avoid excessive modifications that may overload the vehicle.

[StMiguel]

I believe safety is the most important, and if the engine stalls while driving, you should immediately pull over to check. The reasons are mostly engine failures, such as lack of fuel or power causing the startup to be interrupted. Regular maintenance can prevent this, such as frequently checking fuel and oil levels. A short battery lifespan may also cause problems, so ensure the connections are secure.