Originally Posted by Ole Abner
All of the plugs were black. Not oily black but probably from out living their life. They all seemed about the same. They were the double lead variety. I'm willing to believe the O2 sensor codes are a symptom of the overall condition of the exhaust when it runs like this, but injector #2 control circuit keeps coming back. I will look for frayed or damaged wires. I didn't see any when I was testing the ohmage but that means nothing. Thank you so far for the responses. This vehicle was supposed to be the safe, reliable, family car, bought from the family friend who "took care of it". We've put a few grand in cash into it already in just two years.
You could swap that injector with another position and see if the error code moves.
If it does, suggest start with that injector.
Plugs being black... darkish gray maybe but not black. If all of them are the same color, possibly something is keeping your engine enriched, but you'd want a "plug whisperer" to take a look at them.
The injector error you are seeing is probably the best item to follow, either with a new injector or by swapping positions.