Details

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Preventing Engines from Overheating
 – The sensor will detect when the coolant temperature reaches a high level (for example, near 100°C) and signal the control system (ECU) to activate the radiator fan, or take other measures to lower the temperature.
  – This prevents damage to engine components such as cylinder head gaskets, engine blocks, or metal components that can expand and crack.

Better Fuel and Air Mixture Control
 – Water temperature data is used by the ECU to adjust the ratio of fuel and air in the cylinder for more efficient combustion.
  – When the engine is cold vs. when the engine is hot, the mixture requirements change; the water temperature sensor helps ensure that the mixture is optimal for performance and fuel efficiency.

Controlling Ignition Timing & Engine Timing
 – In modern engines, the ECU can adjust the ignition timing based on the engine's cool temperature. The correct water temperature helps the engine run smoother and improve performance.

Cooling System Operates at the Right Time
 – Sensors can activate the radiator fan at a certain temperature so that the engine temperature does not continue to rise excessively.
 – This also helps in start-stop cycles or in idle conditions when the outside air is hot.

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