Park brake warning light...

Hi. The park brake warning light has come up on the dashboard on my Discovery 3 and the parking sensor has stopped working except for the occasional beep. Just prior to this I had the wheels realigned. It has been to a garage and had the rear sensor replaced which I was told was the probable cause but unfortunately didn't solve the problem. Any ideas please? Thank you.

Welcome to LZ.

Will need to get codes read.

Thank you. Its had that done hence the rear sensor being replaced. Back to the drawing board I think!