I'm not sure what you mean by "powered". All cars made from about 1984-on have some type of ECM (electronic control module) or PCM (power control module). These are computers that control various functions of the engine--Like air/fuel mixture, timing and idle, etc. From about 2000-on, many cars have multiple computers controlling everything from the air conditioning to the radio. Some have as many as seven computers. In any case, please be more specific.