2002 Isuzu rodeo v6 has that code on it which implies something is wrong with the intake actuator. Can drive around town fine but get on the highway and it keeps shutting off ( no sputtering or missing it’s just like you turned the key off) after a couple minutes it starts again but won’t get very far. Question I have is if it was fuel related wouldn’t the engine still crank when trying to start? After it shuts off and you try to restart it there is nothing (like a dead battery) but then it starts up and doesn’t sound like a low battery.

P1516 I meant