Electrical – Grounding issue ultrasonic sensor

I'm trying to operate a classic ultrasonic sensor breakout board on my Arduino. I'm aiming for some ultra low power consumption and I have been trying to switch the ultra sonic sensor board via NPN transistor low-side switch. However because the ultra sonic sensor trig Pin is an output set to LOW when not measuring, the breakout board find itself a ground without being switched by the NPN. Any idea how to tackle this ? I was thinking to use a PNP high-side switch circuit, would this be the solution ? Or is there any thing in software side to avoid the trig pin to ground when not in use ?

const int trigPin = D6;
const int echoPin = D7;
const int enPin = DXX;

void setup() {
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(enPin,OUTPUT);
  digitalWrite(enPin,LOW);
}

void loop() {
  digitalWrite(enPin,HIGH);
  getDistance();
  digitalWrite(enPin,LOW);
}

Thank you!