THIS IS DRIVING ME F****** NUTS!!!
If I sit at a traffic light for more than 30 seconds, my traction control light comes on and I get those 2 codes.
I have replaced: spark plugs, fuel injectors, both shift solenoids, air filter, gas cap, evap purge valve … it’s an 06 2.2l LT. Any advice would be so appreciated.

 

I would look for a dirty MAF sensor, see if it’s plugged in correctly and firmly.
inspect the exhaust manifold and flex pipe for cracks and air leaks before the first O2 sensor

https://www.obd-codes.com/p0172

I suggest you have the battery load tested, and the charging system tested , your local parts palace should perform these tests free of charge. I’m thinking sitting in a barn for 2 years the battery is dead, any thing under 12.4 volts is a dead battery!

https://www.obd-codes.com/p0561

 

FYI.
The OP has a post in another thread where they say this car has wiring problems. AKA mice have been chewing on the wiring.

 

Yes, I read that, so they might have knawed on the harness near the MAF

 

P0561 is basically from the Alternator control wire, loose or chewed. That could cause the P0172.

 

Well, the car was in the barn more like 10 years, not 2 . I’ve cleaned the MAF several times, no improvement. BUT, where the connector wire connects to the big wad of other wires…the wires DO seem flimsy to me. Where would I find the alternator wire?

 

Oh! And the battery is only maybe 2 months old.

 

But what was the CCA and static voltage and running voltage?

Alternator wire runs from the starter to the alternator

 

Wouldn't it be the smaller wire, it snaps into the alternator?

 

That is the one I meant.