I've had the P1128 CEL code since I bought this car a month ago, and I just can't seem to get it to go away. I've searched the forums for this and found that most people discovered it was the MAF.

I've looked for boost leaks (none) and also cleaned the MAF (which worked for 20 miles or so until the code came back). What would you guys suggest at this point? Replacing the MAF all together? I took the car to the dealership and they wanted nearly $300 just to diagnose the car.

 

If cleaning the MAF didn't cure it, just replace it. Sometimes you can't clean up a bad MAF, they eventually have to be replaced.