Hi Guys,

Had this C-max around a month or so now, and it's been absolutely fine to drive. A few small issues sorted out by my local garage, but nothing out of the ordinary for a car of this age.

Some background - it has a full service history, two female owners, with 90k on the clock.

Drove to Manchester at the weekend (from Norwich, a big trip!) and was looking forward to giving it a good run a) to prove all is ok, and b) get it to temperature to burn off all the crap that can build-up when driving too many short journeys.

All was totally fine, until I gave it some beans up a hill to reach 70mph, and as the car settled to coast at 75mph, the EML came on with 'Engine Systems Fault'. At the next roundabout, I came to a stand-still, turned the ignition off and on, and it was fine for the rest of the 4 hour journey.

On the way back, all was fine until I stopped, re-fuelled, and 5 mins down the road as I hit 70mph or so again, it did it again.

There seems to be no coughing, spluttering etc.. that would usually be associated with an EML, it just comes on and goes into safety mode. Once the car is re-started, it disappears and drives absolutely normally for the remaining 2-3 hours of the journey.

One of my mates reckons it could be the EGR getting stuck, and so just needs a clean out - apart from plugging it in (which costs a bomb at Ford), any ideas what may be causing it?

I did think injectors... but the car does not miss a beat under load, and turbo etc.. all been very well looked after.

Any thoughts would be appreciated :)