Be super careful of these codes. We replaced the catalytic converters, all 4 O2 sensors, the pcv valve, fuel pressure regulator, fuel pump, fuel filters and had the injectors cleaned and found out yesterday that from running it lean we burnt out 2 cylinders they now have no compression so my 6 is now a 4. I suggest if you get them fix it Immediately, we had them and ran the car after fixing different things only 2 days and the cylinders went. Good Luck.