Found this on the infernal net. "Integral" means it's combined with the MAF sensor, part of it. So, you might have a MAF wiring problem or a bad MAF or maybe a leak in the intake tube around the MAF sensor. Anyway, I'd focus on the MAF sensor, based on what you're not finding. Take it out, clean it up, make sure the wires are all intact.

"The Powertrain Control Module (PCM) uses the Manifold Absolute Pressure Sensor (MAP) to monitor engine load. (NOTE: Some vehicles have a Barometric Pressure (BARO) sensor that is integral to the Mass Air Flow (MAF) sensor and do not have a MAP sensor. Other vehicles have a MAF/BARO and a redundant MAP sensor where the MAP sensor functions as a backup input in case of MAF failure.

Read more at: https://www.obd-codes.com/p0106
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Thanks, babrebonesXL, I will pull that out and clean it and check the wiring.