I had the same problem with my '01 when I bought it. They replaced the coolant temp sensor and it was fine. They mentioned that the connector to the sensor was loose when they went to replace it as well. Whatever the case, whatever they did fixed the problem. Note that there is one coolant temp sensor for the computer and one for your guage. I don't have a part diagram for the car yet, so I can't point you in the right direction. SORRY!!! Hope I helped at least a little bit.
-Mike
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Hello, I was reading your message and it turns our that I seem to have the same proble. I wonder if you ever found a resolution to your issue.
Thanks