Key fob will not reset after replacing battery

You need to visit an auto electrician, an alarm installer or an auto locksmith. The key fob needs re-pairing to the locking system.

Videos that might help

https://www.google.com/search?q=2012+Dodge+Charger.+Key+fob+not+locking+and+unlocking+doors+after+battery+change

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1. Start with the key out of the ignition, drivers door is open all others closed and
drivers door is unlocked.
2. Perform these steps within 5 seconds.
A. Insert the key into the ignition and Pull key out twice (Do NOT Turn)


3. Perform these steps within 40 seconds.
A. Close then open the drivers door twice.
B. Insert the key into the ignition(Do NOT Turn) Pull key out.
4. Perform these steps within 40 seconds.
A. Close then open the drivers door twice.
B. Insert the key into ignition and leave it in ignition.
C. Close the drivers door.
D. Turn the ignition to ON (Do NOT Start) then back to OFF.
E. Remove the key from the ignition.
5. Within 3 seconds, the power door locks should lock then unlock automatically
indicating successful entry into programming mode.
Return to step 1 if the locks do not cycle at this point.
6. Perform these steps within 40 seconds.
A. Press the lock and unlock buttons on the remtoe simutaneously for 1.5 seconds.
B. Immediately after letting go of the lock and unlock buttons,
Press the lock button by itself and hold for 2 seconds. Within 3 seconds, the door
locks should lock and then unlock once indicating successful programming. If
the door locks cycle twice, repeat steps A and B in step 6 as the remote was
not accepted.
C. Repeat steps A and B in step 6 for each new remote.
7. Open drivers door.

1. Get in your vehicle.
2. Close the door.
3. Put key in ignition
4. Do not turn on the ignition yet.
5. Hold down on the unlock button on the door panel. Do not let up.
6. Turn the key to ON, OFF, ON, OFF (while still holding the unlock button on the door panel).
7. Release the unlock button.
8. The door locks should cycle, indicating that you did everything correctly.
9. Have all your remote entry fobs available. Hold down on both the lock and unlock buttons until the door locks cycle. Do the same on all key fobs. This will re-program all of them.
10. Turn ON the ignition key to exit the program mode.
11. DONE.

TRY A NEW BATT IN THE KEY FOB.

TRY A NEW BATT IN THE KEY FOB!

Either the sensor in the car is busted - in which case see your local Dodge dealer for help - or else you just need to replace the battery in your key/fob remote!

1. get in the car
2. shut the door
3. place the key in the ignition
4. lock the doors, manually
5. turn the ignition to on then off...do this seven times
6. unlock the doors and try your remote

once you have replaced the battery you must reset,unlock/hold key over 30 secs...then lock/hold key over 30 secs.....then press/hold unlock button on remote for 30 secs.....reset..

once you fitted new batteries to both fobs you needed to reset the car.....put key in drivers door and unlock/hold key over(windows go down)wait 30 secs then lock/hold over key,(windows go up)wait 30 secs,then press/hold unlock button for 30 secs.you have just reset the system.you have loads of other little gizmos but i will leave you to find them all good hunting....one side parking lights/driveway illumination/and more.
geoff

You should not have to reset the key fob after a battery replacement. The signal from the key fob stays the same and is programed to the reciever.
If the key fob needs to be reprogrammed then follow these steps.
1. Have all key fobs with you during programming.
2. Sit in the vehicle with all doors closed.
3. Lock all doors using the Lock/Unlock switch on the door.
4. Insert and withdraw the ignition key 7 to 9 times within 10 seconds (do not turn the key, just insert and withdraw).
5. The 4 way flasher indicator on the dash should flash once or twice.
6. Insert the ignition key and turn it on (key on, engine off).
7. Press any button on one remote and the 4 way flasher indicator on the dash should flash once.
8. If you have more key fobs to program use the Lock/Unlock button on the door to unlock the doors and then lock the doors.
9. Press any button on the next key fob and the 4 way flasher indicator on the dash should flash once.
10. Repeat if you have more key fobs. Only 5 can be programmed.
11. To exit, simply turn of the igniton and remove the ignition key.
12. Unlock the doors using the Lock/Unlock switch on the door and exit the vehicle.
13. Make sure the window is down when testing remotes in case you leave the keys inside.
14. Close all doors and test all remotes that were programmed.

Do not skip any steps or the process will not work.

If the 4 way flasher indicator does not work when inserting the key, you will need to start the process from the begining. If it still does not work the receiver may be your problem.

If the 4 way flasher indicator does not flash when pressing any button on the key fob then the key fob is the problem (dead battery or defective remote)