ok NGK's are ok

try doing the pedal dance to clear the codes or just disconnect the battery for 15 to 30 mins.
That should clear out any codes stored in flash memory.
If this does not do it then you might want to recheck the wiring and make sure none of the wires at the sensors are broken inside, these harnesses are notorious for this.

Just keep this in mind, every time you disconnect any sensor or component from the system whether it's running or not the system picks up on this and will set a code associated with that component.

If all else fails you may wind up calling a cat dealer to come hook up diagnozer and clear out codes that may be hard set into the ecm that will not clear out any other way. Diagnozer generally can also give a better idea of what is actually happening.