2001 Kia Sephia code P0705

I took my car to autozone for a diagnostic when the engine light came on. The code I got was P1624 of course and the P0705 Trans Range Sensor circuit malfunction. But my 2001 Kia Sephia is running fine, what is wrong with it. Is it the Transmission Range sensor we have changed one of these in a Ford Windstar before, but we want to be sure before we change it that that is the problem, and not a simple fix. Tech at autozone said he doesn't know but it doesn't sound serious.:rolleyes: