Has anyone had an issue with misfires? I was overtaking on the motorway in my wife's 6 month old Ioniq HEV and it started to shudder and the engine emission light came on. The OBD said cylinder 3 misfire, so it went back to the dealer for an official diagnosis (which took nearly 3 weeks for the appointment!). After nearly 2 hours in the workshop I was told it was an intermittent fault causing cylinder 3 to misfire, but as it wasn't doing it then, all they could do was hand it back for me to monitor. I left the garage a little disappointed, only to become extremely disappointed after a quick blast up the motorway 10 mins later to find the fault came back worse and was no longer intermittent! Back to the dealer it went and she's currently in a courtesy car until they receive and fit new injectors to all cylinders.