Engine Starting Itself Without Keys, Now Doors Unlock on Own
My girlfriend drives an '05 Chevy Cobalt, and had an issue today where the engine would start itself as soon as the keys were pulled OUT of the ignition. Yes, you are reading that correctly. With the car running like normal, turning the key to the off position would shut the engine off, as usual, however, as soon as the keys were removed from the ignition, the engine would turn on and continue running until the keys were placed back into the ignition (in the off position). I couldn't believe this so I tried it a few more times and low and behold, same thing (one time that I removed the keys very quickly, the engine stayed off, but then turned on when the tip of the key came within about an inch of the ignition, never actually entering it). They keys have chips in them as well, in case this is needed info.
To try and fix this, I disconnected the ground of the battery and left it disconnected for about 5 minutes. This has seemed to solve the problem as the engine stays off when I take the keys out of the ignition, however, the doors seem to be unlocking themselves now all of a sudden. Not sure exactly how frequently the unlock sequence happens, but twice I have made sure to lock the door, only to go back to the car about an hour later to find the doors unlocked. It is late at night so I am just going to leave the battery disconnected for the time being so that the doors stay locked. If anyone has any clue as to why either of these things are happening, and any tips or guidance on fixing these problems, any help would be greatly appreciated.