just bought 51 reg brava 80 after one week temp gauge suddenly reads high in red, items checked are no coolant loss, engine not overheating, fan working kicks in and out. Temp gauge used to read slighty above half way then go slightly higher until cooling fan kicked in then drop to half way again. Now reads in red all the time except when cold. Can anyone help!!!!

Start with the easy stuff as with any fault, check the connection on to the sender, make sure it is good. Then you can take the sender out and check it with a thermometer in hot water, but personally for the few pounds they cost I would just replace it. If that doesn't solve the problem then the gauge is possibly faulty. good luck

See this thread here:

https://www.fiatforum.com/bravo-brava/199291-brava-engine-overheating-fan-help.html

It's a slightly different problem, but I did add some wiring diagrams for the temp gauge and sensors that might help. The guage temp sensor is seperate from the ecu engine temp sensor, but combined in the same unit.