Code PO108 manifold Absolute Pressure/Baro sensor High Input?

Hello, was there a code or reason you changed the MAF sensor? If there was MAF input low code or something along those lines before you changed the sensor, there might be a different issue causing this code now. Most do not have both a MAP and MAF, but knowing what leads up to changing the MAF out might help here. This code is set because the MAP sensor voltage is too high at idle, which means manifold vacuum may not be correct and that may have been the issue to begin with. But if you have any other codes before the MAF change, post them first. Checking the MAP sensor is not that difficult. It's just a 3-wire sensor, 0 to 5volt signal. It should be around 2volts at idle and be around 4volts with the Key On engine off.

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge