What causes the clicking sound when starting the car but it won't start?

[AdelynMarie]

The reasons why the car makes a clicking sound but won't start are as follows: 1. No fuel: The fuel gauge shows below the red line, so naturally the car won't start. 2. Dead battery: This could be due to a drained battery from leaving the headlights on for too long or the battery reaching the end of its lifespan. It is generally recommended to replace the battery every 2 years. Checking for a dead battery is simple—press the horn. 3. Wrong gear: For automatic cars, the gear must be in P or N when starting. If it's in R or D, the car won't start. Some manual cars also won't start if the clutch isn't pressed. 4. No antifreeze: Some car owners use water or low-quality antifreeze, which can freeze the entire cooling system in extremely cold winter conditions, causing the engine to crack, the water pump to fail, and preventing the car from starting, while also damaging other engine components.