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Could be temperature sensor Could be gauge
When my check engine light comes on, it is caused by the temperature sensor not working. As soon as the light comes on, my temperature drops to cool. If the light goes out, the temp gauge returns to normal.
Your check gauge light comes on if : your coolant temperature guage shows the temperature is high your oil pressure gauge shows the oil pressure is low or your fuel gauge shows the fuel tank is near empty
could be the temperature sending unit
Possibly a leak in the coolant reservoir bottle.
An automobile temperature gauge can fluctuate when the thermostat is opening and closing erratically. The temperature gauge can also fluctuate when the ground wire is loose.
mostly likely something wrong with the sensor or gauge.
Possible intake manifold gasket!!! Hope you have a warranty
could be a number of things, more than likely the sensor, the wiring or the gauge itself, i'd take it to a garage then you can blame them if it goes wrong :P
check the connections behind the gauge they could pop loose
No - the gauge reports 'real-time' the engine temperature. If it is wrong, there is a problem with the sending unit on the engine. This is a pretty easy fix...
There are times when the exhaust temperature light may come on right after washing the vehicle, since water can get into the wires. Another reason for this could be that the thermocoupler ECU's are not working properly.