"Engine Power Reduced" & Throttle Body Issues
2010 G6 4 cyl 115k miles
Sorry for the long post but it's a strange issue. A few months ago during an oil change one of the mechanics somehow cut a wire in the group of wires near the yellow dipstick area, when I tried to leave I started my car and it said engine power reduced, so I shut it off, they fixed the wire quickly and I was on my way.
A few weeks ago I was at autozone getting a headlight bulb and decided to throw in one of those chevron fuel treatment cleaners, the car drove fine initially but about a day later I went to start my car and had the same message pop up saying engine power reduced, the rpms were low and bouncing around, so I shut it off, turned it back on, same reduced power issue, turned it back off, and then back on and it was fine but then I had a check engine light. Took it to autozone and the code indicated an issue with the throttle body. I mentioned that I ran the fuel cleaner through, and one of the older guys suggested it could be fuel crystals in the tank that got lose, and are clogging fuel lines or intake into the engine? Their suggestion was to run the tank down and fill up again before replacing the throttle body, so I did that, ran it down, it ran fine the rest of the week and the code cleared itself off.
I have refueled several times since this, and this morning I had the same issue. After turning it off and back on it seemed fine but my CEL was on. I drove to work, after work the code was off and it's running fine again.
Before I attempt to repair any possible shorts in the wiring, could the story about the fuel cleaner have any validity? Do "fuel crystals" actually cause issues like this? We do have a habit of running it down to a 1/4 tank before refilling so I wasn't sure.
Any suggestions? Do you think it's a wiring issue, or something with the fuel?