Help Please Car starts but doesn't run for a while
 

So i've been having trouble with this problem lately where the car will either not start or it'll start and idle if you don't touch it but if you do something as simple as turn the wheel the car will stall out and die it could run if you rev it first really high and then try and drive but once you come to a stop it'll surely die out again it was throwing the code p0403 but not sure if they're completely related. has anyone known someone who had this problem before or had this their selves?