Clunk from underneath the floor of my 2006 X Type estate

[Brian Baggott]

For some time I have heard a strange clunk or knock from underneath the floor under the drivers seat. My local garage could not identify the problem but comes when I start moving and sometimes when approaching left hand bends.On a second topic sometimes when I accelerate quickly I suddenly loose power and a coi symbol comes up on thedashboard. I pull up stitch off and back on and everyting is ok again. Any thoughts?

[Paulo9]

Hi, I had this on my estate, I finally tracked it down to a slightly loose mounting bolt on the rear of the front subframe which is under the drivers floor, tightening it up to the correct torque cured the knocking after months of suffering with it.