Mass Air Flow and Temperature Intake Sensor Circuit Low

I’ve owned it about four years now, and the only engine-related things I’ve done is to add a K&N Typhoon Air Intake system - added roughly two years ago or about 30,000 miles. That addition added a little extra kick to the car, and all was well until a some months ago.

A few months back my CEL illuminated. I took the car to the dealership and they advised that my MAF sensor needed replacing, my throttle body needed cleaning, and that my K&N air filter needed cleaning.

I chose to do the work myself due to the 300-400% dealer markups on cost, and completed the cleaning of the air filter and replaced the MAF. I’m still needing to do the throttle body at this time (hopefully will be completed tomorrow). I also bought one of the nicer Bluetooth OBDII code scanners, cleared all the codes after I did these couple things, and within no time all the codes reappeared.

In looking at the air flow rate per the MAF, it’s reading a constant 0, driving or idle, always a 0. I checked the wire harness and connection, all appear to be good. No corrosion I can see, etc. I don’t see or feel any obvious vacuum leaks, but I haven’t had it vacuum tested either.

I’m no auto repair pro; however, even with a still dirty throttle body, I would think either the old MAF or the new one should read some kind of air intake flow. But nothing the old read 0 all the time before I swapped it out, and this new replacement MAF sensor reads that same number - 0.

The dealership told me the MAF circuit is the root of all the codes I am seeing on the scanner (photo of all codes attached); however, maybe it’s bigger than that?

Before I go digging further and pulling my hair out, can y’all please give me some advice as to what to do to get this resolved? I don’t have an issue going through various potential causes in detail myself, but I don’t want to be going through stuff and it not be in the right direction. Thanks in advance for any help you can provide!