S40 T5 MAF trouble code
 

Hey guys. I keep getting a check engine light with a bad mass airflow sensor code. Problem is, I replaced it and keep getting the same code. I checked the wiring and connector and all seems ok. The one I bought was a generic, not Volvo or Bosch part. Could that be the problem? The car is running worse every day and is running rich according to the code reader. I have already replaced my tcv, fuel pressure sensor, and retuned the engine. Just not sure what to do. Any help is appreciated :)

I have seen other posts where folks had issues with aftermarket MAFs or even Bosch parts that were not the exact OEM replacement. So its possible the MAF could be at fault. Do you know the brand and their part # to compare to OEM #31342364??