Coolant Temperature Warning / Engine Overheating

How to Fix It

1. Stop safely and turn off the engine.

   Pull over when safe and switch off the engine. Turning on the heater at full blast before pulling over can help draw heat away from the engine — this is a short-term measure only. Do not continue driving an overheating engine — even 1–2 minutes of severe overheating can cause head gasket failure.

2. Wait 30 minutes before opening the hood.

   The cooling system is pressurized and at high temperature when the engine overheats. Opening the coolant cap on a hot engine releases scalding steam and coolant under pressure — wait at least 30 minutes before touching anything. Place a thick cloth over the cap when opening it and turn slowly to release pressure gradually.

3. Check coolant level when cool.

   Once the engine is cold, check the coolant reservoir (a translucent tank near the radiator marked MIN/MAX). If the level is low, top up with the correct coolant type — check your Jeep owner's manual for the required specification. If the level is repeatedly low, there is a coolant leak that must be found and repaired.

4. Check the radiator fan operation.

   With the engine at normal operating temperature, the electric fan should be running. If the fan is not turning with a warm engine, the fan motor, relay, or temperature switch has failed. A failed radiator fan causes overheating primarily at low speeds and in traffic but not at highway speeds where ram air cools the radiator.

5. Check for a stuck thermostat or head gasket failure.

   A thermostat stuck closed prevents coolant from reaching the radiator — the engine overheats quickly even with adequate coolant. Signs of head gasket failure include milky oil on the dipstick (coolant mixing with oil), white smoke from the exhaust, or persistent overheating after other causes are ruled out. Both issues require professional repair.