Why does my car engine run cool?

If your car engine runs cool, it may be due to a faulty thermostat that is stuck open, allowing coolant to flow continuously through the engine and preventing it from reaching optimal operating temperature. Other possible causes include a malfunctioning temperature sensor, low coolant levels, or a cooling system leak. Additionally, if you frequently drive short distances, the engine may not have enough time to heat up properly. It's advisable to have a mechanic diagnose the issue to ensure proper engine function.