[autocare]

I had my BMW X5 E70 EGR Cooler, EGR Valve and sensor replaced at a BMW Garage. But the warning light with code PO401 has come on once I was around 3 miles away from garage. Theyve not got time to look over it and could be another week before they can look at it let alone fix it. I am wondering if this could be a vacuum hose issue and if anyone else has had this issue and what may rectify the problem would be much appreciated. Many thanks