P 1684 code refers to your battery being disconnected (it should go away on its own after about 25 physical restarts as long as you keep the battery connected). The P 1299 is a manifold pressure error. Listen for leaks (hissing sound under hood) and look to see if any hoses are loose or disconnected.
1684 The battery has been disconnected within the last 50 starts
In the 1998 Intrepid ES, 1684 indicates a problem with the catalytic converter. It probably is the same for the 2000.
Probably means battery disconnected or discharged within the last 50 starts.
Trouble code P1684 means:The battery has been disconnected within the last 50 starts
Light Cypress Green Metallic is the exterior color code "PG2" for a 1999-2000 Dodge Caravan.
1684
P 1684 is "Battery disconnected within last 50 starts"
The 1684 code shows a lack of power to the transmission. Check the wiring to the transmission for damage, and worn or improperly connected plugs.
Check Engine code of P0404 (EGR)
End of message, no more codes.
Trouble code P0740 means:Torque converter clutch circuit malfunction
The country code and area code of Bewdley, United Kingdom is 44, (0)1299.