reduce pwr msg,we crawled,ck eng lite, and gas gage went bonkers

What is your question?

just filled up the tank, when this happened no prior problems, everthing returned to normal after turning off engine except the fuel gage is still upside down but still moves correctly. Ive heard the throttle body positon sensor might have caused reduce pwr msg bringing the truck to a crawl but it doent explain why the fuel gage went bonkers