Do a search on the forum. The P0101 is an ongoing discussion.

The P0380 code has also been dealt with. There is an 8 wire glow plug control unit bolted on the radiator fan shroud (on a steel plate on the side of the battery in older models). The glow plugs could have been easily checked w/o removing w/ a multimeter. A DC clamp meter would give additional info. A voltage dip can also create this code.

 

I have a 2013 1.5 DCI 4X4 Duster. My engine management light came on and the OBD reader showed code P0101, the Mass Air Flow (MAF) sensor. I tried cleaning it which did turn off the warning light but it came back on again so I replaced the MAF sensor. Again the warning light disappeared but came back on a day later. Then I found that the short rubber hose leading from the module secured by the 10mm bolt arrowed No2 in the photo (provided by another Dacia Forum contributor), was perished by its lower clamp and wasn't capable of maintaining the seal. Replaced the hose, the light has not returned and the P0101 code was cleared and not returned. Checking this hose might just solve your problem too and hopefully save others from the expense of replacing the MAF Sensor which didn't cure it anyway.