After replacing my thermostat housing and cooling pipe today I now have a PO100 and PO102 error code for the MAF that worked just fine before the work. Check engine light is on and the triangle symbol with ! is on.
I removed and cleaned the MAF with some MAF cleaner spray and checked voltages at the 4 pin electrical connector. The OR has 13.9 v, ground (WH) is good. At idle the ohm reading on the other two wires from the MAF fluctuates between 56 & 64 but I think it is supposed to remain fairly constant.
Idle is normal but occasionally sputters. I am thinking that the MAF may be bad but seems odd it worked fine just before the work.
Any ideas?

2016 Countryman S ALL4 F60/N18 USA
70K