One of the most common issues faced by Renault Megane 2 owners is engine overheating. A constantly rising temperature gauge indicates that the engine is not being cooled properly and, if ignored, can cause severe damage.

Symptoms

• Temperature gauge rising abnormally
• Cooling fan constantly running or not engaging at all
• Overheating when idling
• Steam from radiator or expansion tank

Possible Causes

• Faulty thermostat
• Worn or malfunctioning water pump
• Clogged/dirty radiator
• Low coolant level or leaks
• Faulty coolant temperature sensor

Solutions

• Check and replace thermostat if needed
• Inspect water pump and belt
• Flush or replace radiator
• Repair leaks and refill antifreeze
• Replace faulty sensor

Advice

If the gauge rises, stop the car immediately and let it cool before continuing.