Hi your advice was spot on now looking for a map sensor pigtail done temporary fix out of limp modeI'd carefully check the plug and wiring to the MAP sensor.
Engine running and plug connected.
Pin 1 White/Green - T-MAP SENSOR PRESSURE SIGNAL, NOMINAL 0 – 5 V: VOLTAGE INCREASES AS MANIFOLD ABSOLUTE PRESSURE INCREASES
Pin 2 Yellow/Green - T-MAP SENSOR POWER SUPPLY: NOMINAL 5 V
Pin 3 White/Green - T-MAP SENSOR TEMPERATURE SIGNAL, NOMINAL 0 – 5 V: NTC SENSOR – VOLTAGE DECREASES AS TEMPERATURE INCREASES
Pin 4 Brown/Green - Ground
It's not uncommon for the wires to beak inside the insulation so check for continuity back to the ECU too.