I have been having trouble with my 96 cherokee sport sometimes it will die for no apparent reason other times it wont start sometimes will start and run fine. I turned the ignition switch 3 times to get the flashing code and as far as i could tell it flashed a 12-11-5-5. Can anyone tell me what this code represents or what my trouble might be?

 

Code 11 — Camshaft signal or Ignition signal — no reference signal detected during engine cranking.
12 i think means power was disconnected from the computer within last 50 starts