My mechanic replaced my pcm and now the check engine light goes on so I sent the pcm back and replaced it again and the same thing outcome

Hello, what kind of testing has been performed? Rarely does replacing your PCM do any good. There's a lot more information needed here, perhaps a good technician working on the vehicle would be a good start. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops