Check engine light flashing codes(?) at the wrong time...

[shodown220]

So i pulled into work today, and stopped, cut the car off, then saw i had a couple minutes, so i turned the key to the "on" position, and started listening to music. After a couple of minutes, the Check Engine Light starting flashing, like it was flashing codes. Not just flashing, but in different patterns. Is this normal???

 

[Redline]

It's probably flashing the codes that are stored in the computer at you. Don't know if its normal for it to run a KOEO test under that situation though. I don't know if i've ever sat that long with the key in that position. I wouldn't think it would unless you had the jumper wire plugged in.
I usually just turn it the other way one turn if I just want to listen to music cause then it doesn't turn on all the extra stuff like the fuel pump.