I have nothing but service engine light codes and reliabilty issues since I changed to a reprogrammed PCM (ZZP). I sent the first one back and everything seemed to be fine till now. 2 more codes...

P0102 Mass air flow sensor circuit, low input
P0452 Evaporative emission control system, pressure sensor low input

MAF has been changed twice this year (due to first issues that were not even the MAF)

What is causing this...any help would be great.