Hi all recently purchased a kangoo 1.5dci. problems .... found a pipe had come adrift from turbo and was losing oil and was very smokey and sluggish reconnected pipe and seemed ok then found a small 4mm bore pipe going to a sensor on airfilter body that had sheared from sensor body and was spraying oil all over the place fitted new sensor and reconnected hose should this pipe have oil in it and if not what is the probable cause please????