Hi, I have a 2005 fiat palio adventure model. It is naftero 1.8 Brazilian model. When I start while it is cold, the temperature clock does not go on, so it turns on the chek light. After a while he starts to lift and falls. Let's say it works it doesn't work ... and over there when the car is very hot it starts to work as well. Could it be time for your change? Also lubricate contacts and nothing ....