What are the causes of excessively low car coolant temperature?
2 Answers
Reasons for excessively low car coolant temperature: 1. The thermostat is stuck in the open position. From the moment the engine starts working, the coolant is always in a major circulation state. 2. The engine cannot warm up quickly, the coolant temperature sensor fails, and the cooling fan operates at low temperatures. 3. The cooling system dissipates too much heat. 4. The ambient temperature is too low, and the car is driving against the wind with no insulation measures in the upper and lower ventilation ducts. When the car engine's low coolant temperature warning light is on, it is best not to force the car to drive away. It is recommended to warm up the car for a while to see if the fault can resolve itself. If the fault persists after warming up, the vehicle should be sent for repair as soon as possible. This fault requires professional fault detection, using a diagnostic scanner to read the system's stored fault codes, and determining the location and cause of the fault based on the fault code prompts. Therefore, it is necessary to go to a professional repair shop for inspection in time and not continue to use the vehicle.
I've been driving for over a decade and often encounter the issue of the temperature gauge not rising in winter. If the thermostat gets stuck in the open position, the coolant keeps circulating through the radiator, preventing the engine from warming up properly. Once when driving at -10°C, it took 30 kilometers for the coolant temperature to reach the midpoint, and the problem was only solved after replacing the thermostat. A faulty temperature sensor can also mislead the gauge into showing low temperatures, which requires checking the data stream with a diagnostic tool. Drivers in northern regions should pay extra attention—it's advisable to install a radiator insulation cover in cold weather and avoid shutting off the engine immediately after short trips to allow it to warm up more. Prolonged operation at low temperatures harms the engine and accelerates carbon buildup.
