I have a Chrysler Concorde 2000 2.7 engine. It is showing three computer codes, and I need to know what they stand for. Codes are P1684, P1391 and P700. Can any one help me?

P1684. The battery has been disconnected within the last 50 starts.
P1391. Intermittent loss of CMP or CKP. CMP is camshaft position sensor. CKP is crankshaft position sensor.
P700.?? A number 1 after a P indicates a manufacturer specific code. A zero (0) after a P indicates a generic code. I take it then that you mean P0700 as I know of no P700 or P1700. A P0700 indicates a transmission control system malfunction.