Overheating

Welcome to 2CarPros.

Most likely the coolant temperature sensor. Here are the directions for replacement. The attached picture correlates with these directions.

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SENSOR - ENGINE COOLANT TEMPERATURE (ECT)
Sensor - Engine Coolant Temperature (ECT)

Service Repair No - 18.30.10

Remove
1. Disconnect battery earth lead.
2. Remove thermostat.

Picture 1

3. Disconnect multi-plug from coolant temperature sensor.
4. Remove coolant temperature sensor and discard sealing washer.
5. Remove coolant temperature sensor from cylinder block.
6. Remove steel shim and sealing washer from temperature sensor, discard sealing washer.

Refit
1. Clean coolant temperature sensor and mating face on cylinder block.
2. Fit new sealing washer, then steel shim to coolant temperature sensor.
3. Position coolant temperature sensor and tighten to 17 Nm (12.5 ft. Lbs.).
4. Fit thermostat.
5. Connect battery earth lead

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Let me know if this helps.

Take care,
Joe

Welcome back:

Happy to help. Let me know if it takes care of the issue. Also, when you are doing the work, make sure there are no damaged wires to the sensor and when disconnected, make sure there is no damage in the connector. I recommend using a dielectric grease on the connector to prevent corrosion and improve contact. By the way, since the engine really isn't overheating but the gauge says it is, the sensor should take care of the problem.

Let me know how things work out.

Take care,
Joe