Why is the coolant temperature warning light on in the Volkswagen Sagitar?

[ReeseFitz]

The reasons for the coolant temperature warning light being on in the Volkswagen Sagitar are as follows: Insufficient coolant: This is the primary check you can perform yourself. If you're on a highway or in a remote area without coolant, you can temporarily use water as a substitute. Note: Do not immediately open the radiator cap or reservoir cap after stopping the engine, as the high internal pressure can cause instant ejection. Wait for the temperature to cool down slightly before slowly opening the reservoir cap. Dirty radiator: The radiator has many pores formed by cooling fins, which can easily accumulate fluff, sludge, and other debris, reducing ventilation and cooling efficiency. In winter, reduced cooling efficiency may not be a significant issue due to the low ambient temperature. However, in summer when ambient temperatures are already high, a clogged radiator with poor cooling can easily lead to overheating. This issue can be resolved by simply cleaning the radiator.