Code P2127

I did a thorough cleaning of the throttle body. It was very dirty. (Would it being a former police car meaning excessive idle time cause extra buildup?) I disconnected it while cleaning it. Problem is that I managed to snap a bolt reinstalling it and somehow when one snapped the other snapped at the exact same time. It's now only held on with the 2 bottom nuts over studs sticking out from the engine block. On top of those go the two fuel rails(?) Followed by two more nuts. How do I go about getting the snapped bolts out? How big of a deal will it be? I think they're flush with the block. On the positive side of things, it's not throwing any codes now so hopefully it solved the issue. No way to tell for certain without giving it sometime though. How do I get the car to relearn the throttle body defaults though? It's now idling well at around 650-750-RPMs. Think it used to be around 850 before. Problem is that as soon as I release the brake it goes forward a lot more aggressively than in the past. Think it gets to around 10-MPH without any throttle given.

I was able to extract the broken bolts with just some pliers luckily. Got new bolts and tightened it down. Seems to have fixed the check engine/error code p2127 Throttle Pedal Position Sensor. Problem is that since doing it I appear to be getting sporadic MPG. Some drives I'll get as high as 19-20 MPG. Others I'll get as low as 14. This is all city driving. I used to get 18-19 although I was still on the low end before. Could this be a problem still with the throttle body? The engine has been idling smoothly. I've now replaced the air filter and cleaned the throttle body. I still have to do the MAF sensor. Didn't have the spray before. What else can it still be? If the engine was misfiring it would throw a code, or I'd be able to tell? The spark plugs are due to be replaced soon I believe. Is that the only other possibility? It's a V6 with the back 3 plugs having next to no access. How do I get access to them?

Also, right after doing the throttle body cleaning my ABS light started blinking on all the time. Is it just a coincidence that it happened right afterwards? I'm assuming the sensor or the whole wheel bearing has to be replaced. Is it possible or worthwhile to replace only the sensor? And any way to figure out which one it is without going to the mechanic for his scan tool? My basic OBD scanner doesn't do ABS.

Thanks.

So, after cleaning the throttle body and the MAF sensor the check engine light stayed off for a few months. It just came back. Same code P2127. What's the next step? I already replaced the gas pedal. Should I replace the throttle body or is it probably wiring related?