Parking Sensors

[602cc]

Hello, my 07 Berlingo has factory fitted parking sensors, however, they have not been working correctly recently. When I press the button on and select reverse I get a beep followed by a longer higher pitched tone (similar or the same as the continuous tone when near an object). The manual doesn't contain any instructions on how this works or faults. I can't see anything obviously wrong with the sensors, could anyone suggest anything before I end up taking it in somewhwere.

Thanks.

[Johndouglas]

Try giving them a clean first.

[602cc]

Thanks for the response. Whats the best method? Wiping them over or flushing with water?

[Johndouglas]

Just wiping should do it. You haven't had a towbar fitted recently have you?

[602cc]

Just wiping should do it. You haven't had a towbar fitted recently have you?

Tried that when I washed the car this evening, still the same. No towbar or anything like that. It was fine one day and after a long drive up the country it seemed to stop working the next morning.