Honda Car Forum

Hi,
I just bought a used 2001 honda civic ex (2 doors).

When I bought it :
The driver side door did not respond to the power lock and the remote did not work at all.

I try to replace the battery in the remote, and now the driver side door still does not respond to either the power lock or the remote.

The passenger side door is responding fine to the power lock and the remote most of the time.

My questions are:
- What cause the problem on the driver side door?
- Do you know roughly how much does it cost to fix it?
- Where can I get the part(s) if I want to fix it myself?

Thank you in advance.