My key fob will not open my car doors or trunk. I inserted a new battery in the fob and that did not help. What cld be the proble

My key fog is not working. I replaced the battery in the fog and it still will not open the car or trunk. The key hole is damaged so inserting the key is not an option, I have to use the key fog. I went to the dealership and bought a new fog but they said they have to have the car there to program. I spoke to a friend of mine that works for a different dealership and they spoke with their service dept and were told they didn't think the key fog was the problem. For the last month I have been having to click several times to get the key fog to open the car doors. What can I do to get the ca
Experienced mechanics share their insights in answering this question :
Based on your description, I believe that the first issue is the lack of programming for your new key fob. If the dealership told you that the key requires programming and that was not done, this is the reason that the new key fob is not responsive. Next, it is possible that the key hole in your door is electronic. This means that there is a sensor on your door lock that will allow you to lock or unlock all of the doors by turning the key inside the driver front door lock. If this is the case, the fact that that part has been damaged could have caused this issue. This may not have happened immediately after the key hole was damaged, but over time the issue may have gotten worse causing the key fob problem. I would recommend having your key fob programmed by the dealership to see if that will resolve the issue because that will have to be done anyway. If this does not fix the problem, I would then recommend having the key hole replaced by a qualified professional.

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If your key fob still isn`t functioning after you`ve replaced the batteries, the problem may be with the internal contacts, such as the buttons or the battery connector terminals. It`s also possible that your car and remote unpaired from each other after you took the batteries out.
A bad battery in the key fob is most commonly the reason for a failure to send signals to the keyless entry system. If it is available, use the spare key fob to open the vehicle and start the ignition. If the spare fob is not available, use the provided key embedded in the fob to unlock the door.
Using The Key To Unlock Your Door

The majority of cars now have remote central locking, however, with a flat or dead battery this won`t work and you will be forced to use the key to open the car doors.

If you`re experiencing issues with your remote start after changing the battery, it`s possible that the coolant temperature in your vehicle is too high or the oil pressure is too low. If this is the case, then your remote starter system will be disabled.
So you just replaced your car battery. Start by driving the car for about 20 to 30 minutes, then reprogram your radio presets. , drive the car for about 20 to 30 minutes to reset the computer and charge the new battery before reprogramming your radio and anti-theft systems.
Enter your vehicle and press and release the lock button on your remote five times within ten seconds upon entering the car. Insert your key into the ignition and turn it to the “RUN” position. For four seconds, press and hold the “UNLOCK” and “PANIC” buttons simultaneously. Then, release at the same time.
Insert the key into the ignition and turn it to the “RUN” position. Press and hold the “UNLOCK” button on your remote for four seconds while pressing the “PANIC” button. Stop pressing the buttons at the same time to open the programming mode. Press and release both the “LOCK” and “UNLOCK” buttons.
If the key won`t turn in the door lock, the problem could be dirt or dust in the cylinder causing the pins to be stuck in a partially raised position. If that`s the case, it may be an easy fix. You can spray dry lubricant into the keyway and then insert the key a few times to get the lubricant working.
Disconnecting your battery for a few minutes won`t harm your car and may help your key fob return to factory settings, but the best place to figure out if this is a viable strategy is in your owner`s manual or at the dealership.

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My key fob will not open my car doors or trunk. I inserted a new battery in the fob and that did not help. What cld be the proble
ANSWER : Based on your description, I believe that the first issue is the lack of programming for your new key fob. If the dealership told you that the key requires programming and that was not done, this is the reason that the new key fob is not responsive. Next, it is possible that the key hole in your door is electronic. This means that there is a sensor on your door lock that will allow you to lock or unlock all of the doors by turning the key inside the driver front door lock. If this is the case, the fact that that part has been damaged could have caused this issue. This may not have happened immediately after the key hole was damaged, but over time the issue may have gotten worse causing the key fob problem. I would recommend having your key fob programmed by the dealership to see if that will resolve the issue because that will have to be done anyway. If this does not fix the problem, I would then recommend having the key hole replaced by a qualified professional.

Doors don’t lock/unlock from Key Fob or inside car, Key Fob doesn’t open trunk, transmission locked, AUTO headlights not working
ANSWER : Hello, thank you for writing in. The charging system needs to be inspected. With the vehicle off, remove the negative battery cable and the the positive in order to remove the battery from the vehicle. From there you can inspect the battery cables, and the battery’s ground connection. Make sure the opposite ends of the battery cables are clean, dry, and tight (the positive will need to be traced to the starter and the fuse box). Clean the battery cables if they appear to be corroded or dirty. Reinstall the battery after making sure it was disconnected for at least 10 minutes, as it should reset the memory. Make sure the battery cables are connected securely. Attempt to start the vehicle and put it into gear. If it does not work, then you will want to try cycling the key, and possibly checking into the alternator and other components in the charging system. The new battery may not be working because the alternator has failed to keep it charged. Only further testing will tell at that point. For more help resolving the issue, contact our service department to schedule an appointment.

Passenger side door not unlocking manually with key. Key won’t insert into the door. Trunk lock works fine.
ANSWER : Hi there. The door lock cylinder has either an object in side it causing the key to not fit or the pins inside the cylinder has fallen into the key hole. I recommend replacing the door lock cylinder. If you need further assistance with your key not working in the door lock cylinder, then seek out a professional, such as one from Your Mechanic, to help you.

After unlocking the car from the drivers side, if the passenger door is opened before the key is put in the car the alarm goes off.
ANSWER : The key should only unlock the driver door with one turn and unlock all of the doors with two turns. If the passenger door is unlocking when the driver door is turned with one turn or if the alarm is still set if the driver door is turned two times, then the Immobilizer System Module needs replaced if you are intending on not using a key fob or you will need to get a key fob to manually turn off the Immobilizer System Module. If you need further assistance with your doors unlocking unusual, then seek out a professional, such as one from Your Mechanic, to help you.

Key fob will not open doors. The push button will not start car. There are no dash indicators. Had new battery installed in the vehicle and in the key fob.
ANSWER : The key fob will need to be reprogrammed to the vehicle as when the battery was replaced in the key fob, the key was reset. This is why nothing is working with the key fob. If you need further assistance with your key fob, then seek out a professional, such as one from Your Mechanic, to help you.

I have a 2015 chrysler 200. There is a message that states Key Fob not detected. I have changed out the batteries in the key fob.
ANSWER : Hi There,
This is a known problem in many Chrysler vehicles and is usually related to having the wireless fobs re-flashed or in some cases, a new ECM is installed. I would suggest having the car towed to your nearest Chrysler dealer as this is likely something only they will be able to fix.

Water was spilled in the trunk which soaked the car battery. Car won’t start now. Does water destroy a car battery?
ANSWER : Hi, thanks for writing in about the concern with the BMW 320i. If the battery was submerged in water then it’s completely possible for the battery to short out and die. Your friend will need to have the battery replaced. Also be sure to get all of the water out of the trunk. Have a certified technician, like one from YourMechanic, help you guys out if you need assistance with replacing the battery. Good luck.

I have changed the car battery on my Renault Grand Scenic and used the car that day on the sunday. However 3 days later the car wo
ANSWER : Hello, thank you for writing in. If the new battery has also failed to hold a charge, the alternator is likely not working correctly. You can test the alternator at home with a voltmeter, or you can remove it and have it tested at most automotive parts stores. It will need to be replaced if it has failed. You will also want to make sure all of the electrical connections are clean, dry, and tight. For more help testing or replacing the alternator, contact our service department to schedule an appointment.