my Skoda Octavia NFL (2020-Present) temperature gauge is fluctuating what's wrong

Solution

1. Preparation

• Gather tools and parts.
• Ensure the engine is cool before beginning work.
• Disconnect the battery to avoid electrical shorts.

2. Replace Temperature Sensor

1. Locate the temperature sensor, typically near the thermostat housing.
2. Disconnect the electrical connector from the sensor.
3. Use a socket wrench to remove the temperature sensor from the engine block.
4. Apply thread sealant to the threads of the new sensor.
5. Install the new temperature sensor and tighten it to the manufacturer’s torque specification (usually around 15-20 Nm).
6. Reconnect the electrical connector securely.

3. Thermostat Inspection/Replacement

1. Drain the coolant from the radiator into a suitable container.
2. Remove the upper radiator hose from the thermostat housing.
3. Unbolt the thermostat housing using a socket wrench.
4. Remove the old thermostat and inspect the rubber O-ring; replace if damaged.
5. Install the new thermostat with the correct orientation and torque the bolts to the specified value (typically around 10-15 Nm).
6. Reconnect the upper radiator hose and refill the cooling system with the appropriate coolant mixture.

4. Final Checks

1. Reconnect the battery.
2. Start the engine and allow it to reach operating temperature.
3. Monitor the temperature gauge for stable readings.
4. Check for leaks around the thermostat and sensor areas.