Sorry guys. I tried a search, but egr must be to small of a word. Anyways, wifes 2000 gtp engine code 1 has had a code for faulty egr. I replaced it with a new delco unit, cleared the code, drove it about 35 miles, and the light came back on for faulty egr. Is there some other place I should be looking? Is there a relay, or fuse, or solenoid that might have failed. I know on B-bodys, there is a vacuum solinoid for the egr that can go bad, but W-bodys are controlled electrically, so I am not sure the cause. The code is p0400.
Thank you
