The Differential Pressure Feedback Electronic (DPFE) sensor compares the static pressure before and after an orifice in the EGR tube. Normally there is no flow of exhaust gas to the sensor. However, when one of the hoses come loose or the sensor inlet is broken hot exhaust can flow and melt things exposed to the gas. I disagree that you need new catalytic converters or any other exhaust system component. You just need to replace the DPFE sensor and reconnect the hoses to prevent flow. The hoses are high temperature hoses since they are exposed to exhaust gas. They are expensive. Do not use vacuum hoses or fuel line hoses for replacements. They become brittle with age and can easily break if bent. Avoid bending them by unscrewing the sensor from its mount, disconnecting it from the hoses, connect the new sensor to the hoses and then fasten the sensor to its mount.
A check engine light should have been illuminated almost as soon as you drove your vehicle after breaking the port. You're lucky if the exhaust did not melt the insulation on the sensor electrical connector. See
EGR System O&T for more information.
