(G) temp warning light on

i have a siecento 1.1and thetemp warning light comes on after afew minutes andstays on only used for short journeys can anyone help not loosing any oil or water light does gradually get brighter

How old is the car, is it SPI or MPI???


If its SPI, it could be a faulty warning sender. Does the fan kick in, does the coolant boil? If either of those are present along with the light, DONT DRIVE IT TILL ITS SORTED.

If its MPI, the warning light appears to be triggered by the ECU coolant senser, which, if faulty, would mess up a lot of other engine functions I'd pressume, like overfueling perhaps. Therefore if its MPI, then there is probably some mechanical problem.... ie. airlock, faulty thermostat, faulty radiator. (these could also apply to the SPI)

A few more detials may help

Kristian

Not stating the obvious here but check your oil and coolant levels. You say it isnt loosing any water, has it got any? It may be overheating

As mentioned above, problem mentioned is a bit vague

the car is an r reg sporting 1.1 i have recently had the head gasket done and the head skimmed it has got plenty of oil and water in it does run ok apart from warning light on any help with diagnosis would be very welcome dont want to use it in case i do any damage thanks for looking

air lock in the cooling system, possible after just having HG done.