What can cause an engine to overheat?

Low coolant levels are a significant factor that can lead to an engine overheating. The cooling system relies on coolant to absorb heat from the engine and dissipate it through the radiator. When the coolant level is low, there is insufficient fluid available to circulate around the engine and maintain an optimal operating temperature. This lack of coolant can cause the engine to heat up rapidly, potentially leading to severe damage if the overheating is not addressed promptly.

The other options presented do not directly contribute to engine overheating. High oil levels generally do not impact the cooling system, excessive tire pressure relates to tire and handling performance rather than engine temperature, and clean air filters support engine performance and efficiency but do not affect cooling directly. Understanding the role of coolant in the engine's thermal management is crucial for preventing overheating issues.