* Sudden Stop: The most immediate effect is a sudden, potentially jarring stop. The engine is no longer powering the transmission, causing the car to lose momentum and come to a halt.
* Damage to the Transmission: This is the most serious risk. Depending on the type of transmission (automatic or manual), the sudden lack of power can put stress on internal components, potentially leading to damage that requires costly repairs. Automatic transmissions are particularly vulnerable.
* Steering Lock: Some cars may engage their steering lock immediately upon engine shutoff, regardless of the gear. This can make it difficult to maneuver the vehicle even after it stops.
* Safety Hazards: The abrupt stop can be dangerous, especially in traffic or if the car is on an incline. It increases the risk of a rear-end collision.
* Electrical System Issues: Although less common, abruptly cutting power can potentially disrupt the electrical system, leading to problems with various electronic components.
In short, while some older vehicles might survive the occasional accidental shutoff in drive without major issues, it's always best to put the car in park (P) before turning off the ignition. This ensures a safe and controlled shutdown and prevents potential damage to the vehicle.
