I just installed headers in my 06 G35 and I must say that it was not an easy task. Upon completion there were no leaks and everything seemed to be working well. The only problem I had was the low air pressure indicator light which came on and in spite of putting enough air in the tires, the indicator light has remained on. I have also attempted to clear the code by disconnecting the neg terminal of the battery. Any ideas as to what could be causing this problem..

the monitor could have gone bad. I see it a lot. it will be covered under warranty.

What monitor you are referring to.. Thanks

the tire pressure sensor on the wheel

What you find in the wheel is a transmitter...

monitor transmitter sensor

its all the same.