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The Air Sampling fan on our 2014 Eco sport buzzes to the point of being annoying is this a know issue.
Also the tyre pressure warning system gives a warning I reset the tyres and it still goes to warning after reset it is a intermittent thing is this normal.

Like the car size and all that just don't like these issues
 

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What do you mean by an air sampling fan, is this the cabin ventilation fan or a climate control small fan?

For any fan: Buzzing would mean a moving fan is touching the casing, so casing is vibrating, or more likely there is slack fitting of the fan causes vibration, could be from the inside of the fan itself, needs to be taken out and investigated. (fan and casing and all fixings for it).

As for the TPMS system..Ensure all four tyres are at the correct pressure and reset.
If the under pressure light is still on, then likely one of your tyre sensors has a dead battery and needs replaced.

The batteries only last 4 to 5 to 6 years max depending on make. Go to Kwik fit or any other tire company and they have a signal detector device that tells which sensor has stopped transmitting. Can be expensive as most sensors are behind the tyre valve, and so the rubber tyre has to come off to get to the sensor to replace the battery. Also maybe the sensor in tyre has totally failed requiring a new sensor (thats the worst scenario regarding costs). Good Luck.
 
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