In spite of my tyre pressures beng spot on,the tyre pressure warning system activates,I have reset the system ,but it still activates

 

 

Do  i have a fault on the system?

 

Grateful for any help you can give me.

It may be worthwhile using a different tyre inflator/pressure gauge in case the one you are using is incorrect.

Also, inflating the tyres with another 5 psi over the recommended to see if that puts the warning light out>
You can always deflate them afterwards if no effect.
Alternatively, it maybe the sensors need recoding to calibrate them