My 2003 Escape XLT has a trouble code of P0403, the EGR system. I have changed out with new parts, the entire system, all 3 components. Ive cleaned the tube to the plenum I've even changed the plenum gaskets and I can't get the Check Engine Light to turn off so I can smog it. I've reset the computer , nothing works. WTF is going on. Does the Catalytic converters have their own code if they were the issue? Please help.