My car wont accelerate over 20 mph and i just changed the throttle plate what can it b

Sensors!!! we had the same problem and had to change throttle position sensor! $650 part that comes as a unit w/the sensor itself!

Well it's a2015 nissan altima type s 2.5 loose power while driving&can't speed up does not die,fills as if goes into safe mode/r limp mode.no codes in system

My 2004 Nissan Ultima just got my transmission repaired two years ago working fine to the other day it will go more than 20 miles an hour what could be wrong any idea people

Wont go more then 20 miles

I woke up this morning and my car wouldn't start but I went back out there later on and it started I let it warm up and when I drove it it wouldn't go over 20 mph what could the problem be