I have 2011 plate 2.2. auto diesel (29K) and am experiencing similar problems. Now happened 5 times in last 200 miles (pulling away in slow moving traffic or from a junction and once when commencing to overtake). No warning light is displayed. Dealer has to date (June 16 2016) so far failed to diagnose fault as nothing recorded and they have failed to replicate after keeping car for a week! Now been with them twice and about to go in for the third time. It is very dangerous indeed and leaves me with a vehicle I am very unhappy to drive .I note that there are a number of similar issues reported on various web sites. Surely Hyundai must know by now what is causing this. Is it the EMS which they are reluctant to change due to cost!!!! Would they rather leave me in danger. First occurred a few weeks before warranty expired so I maintain they should fix under warranty. Certainly put me off getting another SUV from Hyundai.

Update on my 2011 plate EGR valve problem. Hyundai refunded 50% of the cost of valve replacement as the fault was first reported before expiry of warranty. In my opinion they should have refunded full cost. I expressed my concern to them that whilst one Hyundai dealer was completely ignorant of the cause of the power loss another immediately identified the problem. Unfortunately my first visit was to the Hove dealer who had no idea and told me to keep driving vehicle and come back to them when fault re occurred and they hoped such would be identified on diagnosis. So I drove it and put myself in danger as power loss became frequent and the warranty then expired. WHY I ask did Hyundai dealers country wide not know of the reason and how to fix it.Poor show Hove and Hyundai Head Office. But my thanks to the dealer in Seaford are due.