Strange Temp gauge / cold heater problem

[JamesT87]

I started my car up as usual today and drove it along my usual 15mile trip home.

on the way it came up to temperature very quickly when it was fully up to temperature the heaters were still not blowing 100% full heat and the temperature gauge was flucuatng between half and the top band forcing the stop and engine management light on. Could this be down to an airleak or loss of coolant? or something more major!?

James

 

[gti6steve]

Coolant temp sensor

 

[JamesT87]

Coolant temp sensor

Sorted it now Steve,

For some reason my expansion tank was empty? havent found a leak or anything so ill just keep an eye on it and see how it goes.

Thanks

James

 

[MicKPM]

Check the stat housing isnt leaking... if its not dropping coolant it will be pushing it out the exhaust.