I Was ridding then out of the sudden engine started to bog down. red light on dash came on and gave code p0005. Can anyone help me out with this and tell me how to fix. 2016 zforce 800

Dear Friends,
I have a problem that puzzles me... my 2006 ZForce 800 EX is not running fast at High gear, reaches about 17mph. It's got 566 miles on it. I'm wearing seat belt and light on dashboard is off. The diff lock seems to work fine, at least on the dashboard lights up correctly 2wd, 4wd and lock. When shifting to dashboard reverse light turns on, goes off when in L or H. Perfectly runs in Low and Reverse. While in neutral it reaches 7500rpm, which indicates the engine is running good. There seems to be a limiter somewhere that causes the unit not to run fast. Any suggestions? Need help. please.

Dear Friends, hopefully you can give me an answer to my dilema. Have a ZForce 2015 that cranks, has spark, replaced fuel pump and injectors and still will not turn on. Compression is at 128 and 127. Replaced gas. Throttle assembly does suck air in. It's a 2015 shows no codes. I'm puzzled any suggestions?