My check engine light is on and My remote start won't work I replced the dead battery in my key fob which now works only for the door locks My remote start will not. I need to reset the check engine light cause that's the problem.

security lockout

Common Reasons Why Your Car Door Isn't Locking Properly The key fob battery is dead: This is one of the most common reasons why your car door lock is not working. If your locks aren't working, replacing the battery in the key fob could solve the issue. The key fob is faulty: If the battery isn't the problem, the issue may be with the fob itself. If you go to your car dealer, they can hook the fob up to a computer and make sure that the programming is still good. If it's not sending a signal, the fob will likely have to be replaced. A fuse is blown: If one door doesn't work, but others do, the problem could be a blown fuse. Replacing the fuse will correct the problem. This is a cheap and easy fix The solenoid is bad: Again, if one door doesn't work, but others do, the problem could be with the door lock solenoid. Replacing it may require removing the car door panel You have a broken wire: If the lock isn't getting power, hold the lock switch either up or down, and then open and close the door repeatedly to see if the lock will work. If it works sometimes, you probably have a broken wire

check tires air pressure sound low.your remote transmitter battery dead need replacing.

Replace the battery in the remote.

If the passkey is messed up, there will be a light on the dash that says security, or have a picture of a car with a lock thru it. If there is no light when the key is turned forward, then its NOT a passkey problem.

does your fob key still operate the door locks? if not do you believe the battery may be dead? or have you already replaced the battery for it? Some parts stores have a rf indicator on their battery displays. This checks for radio frequencies which are used by those keys to determine if the batteries or dead rather than a faulty code programmed. Some vehicles have theft deterent keys which are magnetic or have a unique tumbler pattern which can't be copied easily. On the other hand dummy keys are given if requested/purchased and they can only unlock doors. It sounds like you have a dummy and should check your fob asap

lock smith or someone authorized to use a slimjim[can do more damage if dont know how to use ]--or-- key fob wont work if vehicle battery dead if u can reach up under car at front and release hood latch then jump battery and then use key fob to unlock door

Insert key into door barrel or ignition lock and turn key, whilst doing this press the unlock/lock button, the led on the dash should flash to indicate this has initialised the key to the car, then remove key and test operation of remote. If this fails then a new remote plus coding to the car by your dealership is needed

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)