Freelander td4 sport 2004 running well no issues.Turned on ignition .temperature gauge went straight to hot and cooling fans came on .Started first turn of the key ,engine management light stayed on ,temperature gauge stayed at hot ,fans continued to operate ,and engine ran alittle rough.It seems like the hippo thinks it is overheating when in fact it is stone cold. I would guess a sensor problem but which one and where is it.Can anyone help?