Blue coolant light after a run

[Mike4scuba]

the blue coolant light sometimes goes on and off after a run even though the engine is hot
I thinking that this could either be a faulty switch or wiring issue
Anyone else had the same issue and know the cause

 

[Mike4scuba]

ok got to the bottom of this if anyone else has similar issue
took the thermostat out and it wasn't closing when testing allowing to cooling system to over cool
changed the thermostat and has stopped the blue light coming

 

[hillary]

That is nice man.... When the thermostat was stuck open did you experience a bad fuel consumption ..

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[Mike4scuba]

Because the thermostat was in the open position it allowed the engine to over cool (blue light)
By doing this the ecu produced a richer fuel mixture and lower mpg

Once the thermostat was changed the blu light stayed off. The mpg increased and the heater was a lot warmer in the car

Hope this helps

 

[hillary]

Okay do you still remember the mpg with themostat stuck open ?...

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