Hey, my name is Dusty and I'm one of the auto experts with RepairPal's Car Genius team here to help!
Sounds like you've done your due diligence, nice work.
So the P006A is for MAP - MAF Air Flow Correlation, if there are other codes present, troubleshoot those first, they take priority in the diagnostic documents.
Double-check the intake system for vacuum leaks, this can be done by idling the engine at operating temperature and using a can of brake cleaner, slowly and carefully spraying individual components.
If a leak is present you'll hear the engine rpm spike briefly (fuel trim data will spike as well if you prefer a data view).
If you have access to a scan tool with live data capabilities, check the MAP (or Atmospheric Pressure) output values (key on, engine off) normal value should be between 600-825mmHg (80-110kPa).
Normal atmospheric pressure is 757mmHg (101 kPa) Every 100 m (328ft) increase in elevation, pressure drops by 7.5mmHg (1 kPa), and weather conditions may also have an effect.
If the MAP sensor is out of this range, replace it, clear the codes, and re-test.
For reference, MAF values should be between 3.4-6.2g/sec at idle.
If that checks out, double-check the PCV system, hoses, valves, etc., (you may need to remove the intake manifold to gain access) and replace any suspect components.
The PCV valve is mounted in the exhaust manifold and will need to be removed and checked manually.
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