Help!

2000 Honda Accord ex coupe (mil 104,000) I have a have a check engine light saying egr malfunction, I replaced it and reset the battery later to turn on again. Keeps telling me I have a egr malfunction. How can I fix this problem?

When putting the car in reverse every now and then it make a loud click noise and gives me a quick tug. Also tugs when I change gears every now and then. I was told the motor mounds were messed up. What advice can I get from you guys on these problems? I would really appreciate it