Ok, so i just went and got codes pulled for a knock sensor and ignition coil misfire. All 6 coils have already been replaced within the last year! so the guy cleared the codes and later that evening i replaced the MAF because it had to be done finally. The light stayed off. This morning the light was back on and i went and got the codes pulled again and i got:

P0430 Catalyst Efficiency Below Threshold(Bank 2)
P1320 Manfacurer Contrl. Ignition System or Misfire

once again, all 6 coils have been replaced within the last year and i just switche the MAF. My step dad told me that he also had already replaced BOTH O2 sensors. Whats the deal?

 

Unplug the negative form your battery for at least three hours.. put it back in and run it slow for a few miles.... that should clear the codes....if that doesn't help there is something else WRONG