That is just a code that comes up telling you there is another code written. Need a Chrysler scan tool or a programmer that reads codes like the smarty or edge. Normal odb2 readers won't work. Could be anything from a turbo over boost or failed injection pump. Truck usually goes into limp mode too. Well at least mine did and it was the day i bought it was turbo overboost. Cleared it and it came back right away but this time was the injection pump.