Hi i have a Dodge Magnum with error code P1400 ,whats is this and what ca a do? the car is missfiring sometimes when a drive slow and the the light comes on

 

i believe this is the EGR evap sensor, there was a low voltage detected. the sensor is located on the passenger side firewall. it is the thing with two vacuum lines connected to it.

i would check and make sure that both vacuum lines are connected and not leaking. also, sometimes these sensors get water in them from severe rain or car washes. disconnect it and dry it out with compressed air. reinstall it and make sure the electrical connector and two vacuum lines are secure, clear the codes by pulling fuse #11 for 1 minute. see it that helps before you see the dealer.