I thought just for fun I will check my car cold(when I have my misfire problem), so I drive maybe 3 min to get my morning coffee. Get out jump the two terminals and start counting blinks, I get code 21. Which is ignition fault. Could mean coils, plugs, ignitor or even coil pack wire harness. What I don't get though is why didn't my engine light come on if there are codes being stored?