What are the reasons for a car not starting?

[LeGabriella]

Here are the reasons why a car may not start: 1. Battery depletion - the starter begins to turn but lacks sufficient rotational speed (weakness), then the starter only makes a clicking sound without turning. Low winter temperatures and forgetting to turn off certain electrical devices can cause the vehicle to fail to start, as the battery voltage drops below the rated value, preventing the starter from operating normally. 2. Fuel flow obstruction - no oil pressure in the engine fuel supply pipe. Long-term dirt accumulation in fuel lines at lower temperatures, and the mixture of water and debris at low temperatures can block the fuel lines, causing the engine to fail to start. 3. Poor ignition system performance - in cold weather, due to low intake air temperature, fuel atomization in the cylinder is poor, and insufficient ignition energy can lead to cylinder flooding, where excessive fuel accumulates in the cylinder, exceeding the ignition limit concentration and preventing the car from starting.