Join Date: Sep 2005
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I get this high pitched whistling noise too if I try to lock the car with any of the doors, the boot lid, or bonnet not fully pushed closed.
Its a warning device to tell you something isn't closed correctly.
If you know for a fact all is closed correctly then I guess it could be a sensor thats gone duff. Don't ask me where these are tho
Currently in hondo's garage:
1.6 Valve-Matic SR. Red hot, toasty feet.