Hello, my 97 Z decided to throw the infamous SES light--my son pulled the codes and they were one for low voltage on the TPS and a Po400 egr code. When i had my Mac Headers installed i got the po400 code, but used copper Rtv sealant around the header/EGR tube hookup. Light went out. EGR isnt that old, got it under that recall---Was just curious if the two were connected somehow. By the way the screws that hold the TPS on my BBK TB are just about stripped out, got a piece of metal making it tight on the threads,dont have a meter Thanks Dwayne-----May leave it all hooked up and get Bryan to delete it(EGR)