Hi have a 406 which runs fine then will loose power and the management light comes on, if you bump it all is ok or you have to turn ignition off then on, also sometimes it will cut out when slowing down but starts at the turn of the key. On the Pug diagnostic it pointed to a sensor on the filter housing which was replaced and seemed to cure the problem but now it has come back. When changing the filter there was a little grit in the bottom of the housing not sure if it was shiney. Any help would be appreciated. Cheers Paul.