The Iceland midfielder is struggling with a back complaint and will be assessed on Friday, with manager Aidy Boothroyd admitting he is "touch and go" for the Ricoh Arena encounter.
Summer signing Stephen O'Halloran (back) will definitely miss out, however, along with long-term absentee Gary Deegan (ankle).
Full-back Chris Hussey (foot) and striker Roy O'Donovan (ankle) have recovered from their respective knocks and are in contention.
As well as O'Donovan, fellow new faces Lee Carsley, Gary McSheffrey, Lukas Jutkiewicz, Richard Keogh and Clive Platt will all be hoping to make Boothroyd's first competitive XI since taking over from Chris Coleman.
Trialist Francis Laurent could also find himself in the matchday 18 should he sign in time for Saturday. Boothroyd said: "It's ongoing, we're still trying to sort something out. We'd like to sign him. He's done well enough to be given an opportunity to progress."