Check engine light

Triple Chico

New Member
Joined
Aug 22, 2019
Messages
13
Location
Long Island, NY
Hi all.
Need some advice. Bought this 06 Jeep a month ago. I’ve had multiple instances where the ECL came on. First time, code was for Squib something or other. That went off on its own. Weeks later second time, multiple cylinders misfiring, 1,3,6. I proceed to change the plugs and coil, (even though they looked newish at start) , still light, then disconnect batt, and all good. Weeks later, third time... now I show brake switch 1 stuck off.
What the hell!! Is my computer system going haywire? Please any advice??