Problem with parking sensors check sonar

[Johnlex]

Yesterday suddenly my car came up with ⚠️ 

on the dash check sonar 

on the computer screen check sensors 

what is the problem 

does anybody know how to rectify 

Pictures below. 

[dutchie01]

Could be they are blocked by dirt so will not operate. Did you try to clean them

[Johnlex]

Yup tried to clean

nothing 

[Bluemarlin]

Did you wash the car prior to it happening, or did it rain?  Sometimes water can get into the sensors and cause a fault.  If so then you could try something like wd40 to try and disperse any water (wipe away any excess), or leave them to dry a while and see if they work then.

[Johnlex]

I’ve tried cleaning 

nothing 

 

Book says take to Lexus main dealer