Fabia Classic estate 1.2 HTP thermostat problem

Hi everybody, My name is Steve, i am a retired FireFighter having served 31 years in the Brigade / service, i have recently inherited a Fabia Cassic 1.2 estate 2005, with less than 17k on the clock i recieved the vehicle only last month and everything was fine untill a couple of days ago when i noticed the tempreture needle fluctuating then sticking before finally moving to the mid range position, and on top of that i am getting an intermittent engine management light i am wondering if the two are connected.

I wonder if any of this forums members can tell me where the sensor is located and where i may purchase the said article.

Thanks for taking the time to read this, i do hope somebody may be able to help.

Thanks again,

Steve G