My engine management light saga rumbles on....today I took it to a main dealer thinking that they would definitely get to the bottom of it. So....fault code PO401. They tell me I will need replacement EGR cooler, and possible decode or replacement of manifold. To go with the brand new EGR valve fitted 2 weeks ago. The quote for this is absolutely eye watering. They did say I might like to have a chat with Sales and see about part exchange? Car still driving perfectly, fuel consumption great. Really at my wits’ end now??