Usually that code is due to the DPFE sensor failing and not due to an EGR restriction, but try cleaning out the passage with TB cleaner and if that doesn't work, my money is on thew DPFE being shot.
On the V6 it goes out quite often due to a poor POS design.. I changed mine TWICE, until I went tubo and threw it in the trash (turned the thing off in the computer chip program).
