Automapper: Ignore on condition of

Is it possible to ignore mapping a member depending on the value of a source property?

For example if we have:

public class Car
{
    public int Id { get; set; }
    public string Code { get; set; }
}

public class CarViewModel
{
    public int Id { get; set; }
    public string Code { get; set; }
}

I'm looking for something like

Mapper.CreateMap<CarViewModel, Car>()
      .ForMember(dest => dest.Code, 
      opt => opt.Ignore().If(source => source.Id == 0))

So far the only solution I have is too use two different view models and create different mappings for each one.