I think the codes were 12 & 15 then you sould have gotten a code 55.
First one says your battery has recently been disconnected. The next code concerns your VSS sensor. The last code is saying The End.
"Taking care of our veterans is a cost of war. If you can spend six trillion dollars sending people to war, you can spend a few billion dollars taking care of them when they come home"
Sen. Bernie Sanders (I-Vt.)
If what doesn't kill you, makes you stronger, I should be able to bench press a Grand Cherokee by now!