actually that has happened to me before.(i have a 4 door civic 5 sp 90) but im not to sure y it is.maybe a faulty injector?....When it happens to me(i never got the code 16 that way .only when i was driving and it came on),its if i turn it off....maybe on a day thats really hot or something.but ill turn it off.and if i try to start it back right away......it wont start.. .im not to sure wut is causing this.but i would like to get it fixed very soon...