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		After doing my clutch and gearbox I noticed a plug wasn't plugged in going into the coolant expansion tank, so I plugged it in and the light comes on, but it goes on and off whilst your driving. I drive home from work which is 15 minutes, it will go on for abit then it will suddenly go off.
	
	
	
	
		
	
 
 
	
	
	
		
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		Is your coolant level low?
	
	
	
	
		
	
 
 
	
	
	
		
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		So will I have to replace the expansion tank or? Where is the sensor
	
	
	
	
		
	
 
 
	
	
	
		
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		Just replace the sensor. Its just a push and twist fit in the back (engine side) of the header tank.  Or just unplug it again lol.
	
	
	
	
		
	
 
 
	
	
	
		
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		Try taking it out and clean the scale off the two prongs, then it should work fine.
	
	
	
	
		
	
 
 
	
	
	
		
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		With this light on an off, Ive got an MOT saturday and with my luck it will come on, will it fail the MOT?
	
	
	
	
		
	
 
 
	
	
	
		
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		No it wont, you might get an advisory.