Why Won't an Automatic Transmission Car Start?

[KevinRose]

Reasons why an automatic transmission car won't start: 1. Spark plug failure—if the engine cranks slowly during startup, it may be due to insufficient battery voltage or a faulty starter motor; 2. Lack of antifreeze—in extremely cold winter conditions, some owners use water or low-quality antifreeze, leading to a frozen cooling system, cracked engine block, inoperative water pump, failure to start, and damage to other engine components; 3. Incorrect gear position—when starting an automatic car, the gear must be in P (Park) or N (Neutral). If left in R (Reverse) or D (Drive), the car won't start; 4. Dead battery—this could result from prolonged headlight use without turning them off, battery depletion, or an expired battery lifespan. Additionally, installing aftermarket HID headlights, high-power audio systems, or DVD players may cause electrical circuit failures; 5. Excessive carbon buildup in the engine can also prevent the car from starting. A solution is to frequently drive at highway speeds to clear the deposits.