How can you change water temperature sensor on Picasso?

To change the water temperature sensor on a Citroën Picasso, first, ensure the engine is cool and disconnect the battery. Locate the sensor, typically found near the thermostat housing or engine block, and unplug the electrical connector. Remove the old sensor using a suitable wrench, then install the new sensor, reconnect the electrical connector, and finally reconnect the battery. It's advisable to check for leaks and ensure the system is functioning correctly after replacement.