2.2 volt would mean a 2-bar sensor. That is correct?
You are measuring voltage with key on, engine off?
What is the signal voltage when the map-sensor is disconnected?
Have you checked the ground? Common for Map, TPS, ACT and ECT to ecu pin 11.

When the voltage is that low, the car is probably under fueling when cranking.
With 0.4 volt the L8 with not try to calculate a replacement value.