key fob reprogramming

How to Reprogram Key Fobs Yourself at Home

In Electric by Magnus Sellén59 Comments

reprogram key fobElectronic car keys, also called key fobs, are extremely useful in controlling your car’s doors, trunk and alarm, and can even remotely start your car from a distance.

Like any other electronic device, these key fobs can malfunction after some time, typically due to signal loss. However, in such a case, you can easily reprogram the remote yourself so that you can still use it.

In this article, we will explain step-by-step how you can reprogram your car key remote so that you don’t have to take it to an auto-dealer and spend your precious money.

Key Fob Reprogramming in General

Different cars have different ways to reprogram their key fobs. The process mentioned below is the simplest way to reprogram any remote in general. This guide works with most cars on the market, but sometimes you need to find information for your exact model of car. You can find more specific information about your car’s remote from the owner’s manual.

1. Replace the batteries inside the key fobs

Before doing anything else, replace the battery in the key fob/s if you haven’t done so for a while. A bad key fob battery can give you a real headache while you are trying to reprogram it. The batteries are often cheap and also easy to replace. Check your owner’s manual if you do not know how to replace them.

2. Get inside the car

Get in the driver’s seat with your car keys and the remote and close all the doors. Closing the doors is very important, as it may disturb the process if they are left open.

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3. Turn on the ignition

Once seated, insert the keys into the ignition and turn to the ‘On’ position so that the electrical systems are powered. Make sure that the ignition is not in the radio mode, and do not start the engine.

4. Press the lock button on the remote

With the key in ‘On’ position, press the lock button on the fob and turn the key back to ‘Off’ position. Repeat this process at least three times ending the cycle with the key in ‘On’ position. This sends an indicator to your electronic control units that it’s your key in the ignition, that’s sending out the signal, and it does save the data afterward.

5. Listen for a Lock Sound

Once you have repeated the above process, you will hear the lock sound. This indicates that you have entered the programming mode. Once this is done, press the lock button again within five seconds, and the programming will be successful.

6. Programming additional remotes

If there are additional remotes, press the ‘Lock’ button within 10 seconds after you enter the programming mode to program those remotes as well successfully.

7. Turn off the ignition

Once the above steps are performed, turn the ignition back to ‘Off’ position to terminate the programming procedure.

8. Step out from your car and test the result

Take your key fobs with your and leave the vehicle and close all doors. Test to both unlocks with all your keyfobs that got programmed to verify the function.

Specialist Hardware Required to Reprogram Key Fobs

For some cars, reprogramming key fobs may not be easy, and in that car, specialist hardware may be required. Typically, we would suggest that you call your authorized car dealer to take care of the situation, but this can be expensive.

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You can have your car remote key re-encoded from any other auto locksmith company or a mechanic workshop for a comparatively lower price and have a separate master key made as well.

Creating a new master key may require a code card which can be found in your car’s manual.

Understanding Vehicle Security

key fob reprogrammingThe car security can be divided into two categories – Car entry and Starting the car.

In most of the modern cars, you are not required to insert keys to open the doors since they come equipped with remote locking/unlocking. The older car remote entry systems used RF systems which were not fully secure as their signal could be easily captured and played back to unlock and enter the vehicle.

The modern entry locks use a more sophisticated rolling code system which generates a new code every single time. The receiver on the vehicle also produces the same code, so both the electronic devices are perfectly synchronized. Infrared systems were also used previously by some European manufacturers who required pointing the remote towards the car to unlock, but most of them have been replaced with RF technology now.

Talking about starting the vehicle, traditional cars had a simple key lock system which could be unlocked from any similar key. This was convenient for thieves as it allowed them to drive away with any car easily. However, new cars are equipped with ECU technology as well as a transponder for added security.

Luxury vehicles, on the other hand, can be coded according to the driver’s specification. For instance, vehicles such as Rolls-Royce have a memory function, and as on as the driver inserts the key, the seats, headrest, mirrors, and steering wheel are adjusted according to the driver’s settings.

Manufacturers are now working towards removing the need for the key altogether and adding a fingerprint recognition system.

What is a Transponder?

Transponder technology is now apparent in many areas that require security access and is now popular in modern automobiles as well. New vehicle keys now feature a transponder chip, and as the key is inserted into the ignition, the chip is triggered by the radio frequency signal sent from the ignition barrel.

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The chip then transmits a signal to the car’s ECU which, when found to be correct, disables the immobilizer and starts the engine.

If you want information regarding the key remote of any specific vehicle or if you are unable to reprogram your key fob, comment below and one of our trained technicians will get back to you.

Hello I'm Magnus, the owner and the writer of this website. I have been working with cars since I was 16 and I'm specialized with in-depth Automotive diagnostics. Also been driving drifting for the last 6 years. I'm here to give you answers to all your automotive questions and I hope that you enjoy our content.

Comments
  1. I have a 2001 Dodge caravan and I replaced the battery and even had it checked to see if it’s working. It is! But I’ve tried numerous ways to program the key fob and no results

    1. Yeah I got a fob but it doesn’t lock the doors if I programed it wrong can I re try to program it ? Also when I was programming it I acicdentently started it before the programmming was complete can I un do the battery in tbe car and key fob

      1. Tried to reset tire pressure system by holding both unlock and lock button now lock button is disabled wasn’t working manually either somehow fixed that now I can unlock manually but the unlock button on the key fob isn’t working

    2. I am Dugba, I need coaching on how to use ancel to programme and reprogramme keys.

      1. I purchased 2 new fobs for my 2011 ford escape and programmed them. They both work to lock/unlock and turn the car on so radio/windows etc work but the vehicle will not start. What can I do to get them to start the vehicle? Thank you.

    3. I have a Golf 5 2litre car. It doesnt start the engine because of the key sign which keeps flushing on the dashboard. Kindly assist.

    4. Hi! My vehicle is a 2014 ford focus titanium and I changed THE BATTERIE OF my key but for some reason it says key not detected???OF

  2. Author

    Turn on your Ignition
    Press the UNLOCK button on your fob 4-10 seconds
    Press the panic button for 1 sec while holding the Unlock button.

    I hope this helps! 🙂

    1. Hi
      My car is locked and I have only one key and I lost it and I can’t get inside
      What should I do
      It’s a 2016 nissan murano

  3. I have tried everything! Nothing is working. I’m so aggravated. I don’t want to spend money I don’t have to get it programmed. Someone please help me……

    1. Author

      Unfortunately, if these methods are not working you may have to let a workshop with the right diagnostic equipment to reprogram/repair it for you. There might be a problem with your keyfob.

  4. Any advice for a 2005 G6? I know everything I’ve read says I have to have it programmed by locksmith or dealership, but I’m a geek and chronic DIYer. I would like to learn how to program FOBs through ODB2. I have Telus Drive, but it won’t act as an interface, even if it reports errors and such like another scan tool. I have a couple of new FOBs for my Pontiac because the original was a universal remote and the battery tabs broke away from the circuit board and then it reset itself. (I got it working but now it isn’t synced with the key transponder.) Any advice on where to go from here with programming the FOBs? As it is, I can’t even manually unlock my door with the key without activating the alarm until I start the ignition.

  5. I bought a 2002 Passat Volkswagen it has a busted ignition system and I have no key is there any way around that system thank you

  6. I am trying to program 2 new key fobs for a 2000 Buick LeSabre.

  7. trying to pro gram a new remote fob for 2013 chev traverse is this possible if so can you help

  8. Changed ignition barrel on 2007 Hyundai Accent & now car won’t start…it has immobilizer light flashing on dash. How do I reprogramme the new keys?

    1. Take the “Chip” from old key and put it in your new key. It is a small black plastic piece inside your key. It worked for me because I can take my key apart because it contains a battery for remote. Some keys are sealed and you cannot open them. You can take out chip from original key and glue it to the car ignition. That is the cheapest way. Hope this helps.

  9. My key fob was working Thursday night, it stopped working on Friday and now I can’t program it. It will enter programming mode and that’s all. 99 Taurus so 3.0 ohv v6.

  10. Hi I’ve lost the key to my 1998 VT SS 5ltr in Australia,
    Been stuck for nearly a year now I’m so disappointed my cars jst sitting there at the moment any advice to help me program a new key/fob
    Due to every day living expenses these days has put me in a spot where I just can’t afford to other wise at the moment
    Any help would be great thanks

  11. 2014 Mitsubishi outlander sport. Replaced the battery now it unlock the doors but car wont start .please help, im stuck at work.

  12. If I have a 2012 Honda Civic, can it be reprogrammed by myself using the on and off on the ignition and hitting the lock button? Would that also handle the immobilizer and I should be able to start my car?

  13. I’m glad you mentioned that cars that utilize key fobs will have different ways that they are programmed. The key fob for my wife’s car recently stopped working, and I don’t know if it is because the battery is dead or if it needs to be reprogrammed. I don’t want to break anything, so I think I will take it to a professional locksmith to have it fixed.

    1. I washed the key pod by accident in my husband’s pants I dried it all out the only part on it won’t work is the lock or unlock I put the key pof up to the handle of the car I could get in I could start the car too by the remote but when I get out I have to lock it manually.it will not lock I put new battery in it lights go on blinking but no locking sound and it will not lock the back hatch
      2015 Tucson is there any way of me fixing it , Thank you

  14. We have a 2012 Volkswagen Beetle that the ignition switch locked up on so we ordered a new ignition switch and key but the car won’t run it starts but runs for a few seconds and quits can we program it our selves instead of having to haul it two hours to a Volkswagen dealership

  15. I have a 2009 chrysler 300c

    Replaced the batteries two times cant figure out how to do it myself. Any advice? Besides the locksmith who wants about 400

  16. Hey there,
    I have lost the key to my 1998 VT SS 5ltr in Australia,
    Been stuck for nearly a year now I’m so disappointed my cars just sitting there at the moment any advice to help me program a new key/fob
    Due to everyday living expenses, these days has put me in a spot where I just can’t afford to otherwise at the moment. I have chosen the best Locksmith Tools at that time.

    Thanks for sharing…

  17. 07 Nissan versa sadan I have the key but lost the fob. Remote entry. I have a problem trying to program the fob I cant get my key in and out of the ignition fast enough. Is there another why to program this new remote?

  18. Had keys stolen for Honda Civic 08 2.2 diesel. Changed ignition and locks and exit to correspond with new key. Now all I’m getting is little green key flashing to say not working with immobiliser.

    Any help would be greatly appreciated and any advice on what to change as got another full car there for all computer bits

  19. 2013 Dodge Durango Key fob w/push to start. I lost one….ordered a replacement on Ebay. I will need to get the emergency key cut, but how can I program this on my own?

    Thanks for having this site.
    –Troy

  20. Had to replace the battery in my 2015 Jaguar XF, ow my flob keys will no start/stop the car. I have the keyless lock flob. How can I reprogram the keys.

  21. Hi im trying to reprogram my key fob for my 2006 dodge durango but i cant unlock my doors to get in and put key in ignition i was wondering if there’s a way i can reprogram my fob without getting in my vehicle

  22. 2006 Mazda 6 key fob and car battery both replaced now, nothing! I turn key to start position, it does nothing. The lights and dash board work, in on position and only when I’m on position will the doors lock and unlock but not with key fob. Help me start my car please.

  23. Just put a new battery in my key fob,all electronics work,but car won’t start
    My car is a 2007 proton

  24. have a 2013 Cadillac SRX and have lost the key fob. I called AAA and he got me into my car…no fob. I thought maybe it was in the car And had a dead battery. No go. I now have a new keyless entry fob that is an exact duplicate of the one I lost. However, I cannot unlock the car with it. What should I do? If AAA gets me into my car again, can I program the new fob myself?

  25. Tod.
    I purchased a 1998 Dodge Ram (2500 series) Van. I have 2 Keyless Entry fobs that seem to have lost the signal to the van. I replaced the batteries and they were tested, they do send out a signal but my van is not responding. The fobs are rectangular with only two buttons on each, lock & unlock.
    Can someone please help me with information on how I can program these fobs to my van?

  26. can I reprogram a 2005 nissan pathfinder key fob in order for it to work on a 2010 nissan rogue

  27. i have a 2013 chevy spin. Remote key case was broken and the circuit board was lost.
    Is purchasing a new remote key and reprogram it possible?

  28. i lost the transponder part of my bmw key, i still have the keyblade so if i buy a new transponder can i program it myself?

  29. I had a 2015 Kia Sedona ex., unfortunately it was totaled. I recently purchased a 2015 Kia Sedona sxl. The sxl only came with one key. I still have a fob from the ex. Can it be reprogrammed to use on the sxl. Is this something I need a locksmith or Kia dealer for. It is a fob only no key needed inserted in ignition. Push to start? Any help would be appreciated.

  30. Bought a spare key fob for my 2018 dodge caravan already have the original but came with one fob so bought one just need to progrAm it

  31. I have an old FOB (no keys)from a Toronado. I would like to be able to get it programmed for use on my Buick Century. Is there a way to do this?

  32. I tried starting my 06 Octavia VRS with just the key, left the fob in the house, car turns over revs half way then cuts out. I left the fob indoors as I was replacing it as the old one was tatty. Have I activated the immobiliser? How do I fix this problem now?

  33. The remote control for my 2008 va transporter shuttle t30 stopped opening the doors but would lock so I changed the battery and now it won’t do either

  34. Good morning. Can u help please.I have a mazda axela and the car wont start and my mechanic suggested car remote reprogaming.

    1. Trying to program another key fob to my nissan alitma 2008 2door coupe I have the actual key but the fob got lost and now I cant start my car it has push button start on it

  35. hi I have a Peugeot 3008, I have had to replace the keys, but the problem I have is the keys programmed ok to start the car but the remote will not operate the the doors etc. tried to initialise by turning on and holding button for 5 seconds but this does nothing .

    is there any buttons I am meant to switch to activate programming or sequence

  36. Hi there. I have a 2018 Chevy Express Van that used to be a uhaul. I would like to add a remote start to it but it seems that uhaul put a blocker code on the transponder and it cannot be reprogrammed without it being removed. No one seems to know how to remove this program a remote start for my vehicle. Uhaul is no help and chevy said without uhauls help, they don’t know what to do. Any suggestions that you have are very much appreciated. I can’t find any information on this anywhere.

  37. Hi
    I got Jeep Cherokee 2005 model 2.8crd auto.my key can only operate manually,but it cant remote control.It started after it fell down.I can open doors manually,the indicators will flash until I enter the key into ignition and turn it on.No security alarm sound even though the harzards flashes Please help

  38. 2019 Nissan armada. changed battery in key fob now it doesn’t work. Looked every where for reprogramming information, no luck. it is a keyless start vehicle. no place for a key. can I reprogram the key fob?

  39. I have a 2007 Nissan Altima that is actually owned by my boyfriend who is in prison. When we first started our relationship the Nissan was in a auto repair shop. Reason was because his ex girlfriend stole his key fob. We paid $1300 to get the car out of the shop. I have suspicions that there is a duplicate of my key fob used by unknown . Is that possible? When getting the car out of shop the fob that was handed over looks like the original but it’s missing the door key that goes into the slot of the fob. Yet suspicious I found a copies door key to the Nissan in glove box buried and my boyfriend actually thought the key belonged to his mom’s car and he never made it clear he knew of the keys existence or not. Either way I just don’t like the idea of the old key fob working for this car. And what exactly the process that was taken with the auto repair shop that cost $1300 seems expensive I think . Overly expensive. As well of his stock stereo being stolen while in the shop as well. And along with the fact they left all the windows down and when we got it it was full of dirt and nasty. The car was their for an extensive amount of time months. My boyfriend tool it to that shop got arrested and didn’t get out for a while. So that might of added to the cost being so high. However the guy who released the car conveniently no longer works there. I needed to obtain a receipt for private reasons. Nothing to do with their services. Other then proof for a judge in my boyfriend’s case relation. Something just doesn’t seem right about the whole new programming done by that auto repair shop.

  40. good day

    I have Mg6 model 2012 car, the time I bought the car they gave me one key and I decided to buy a back up key and I want to program it, can anyone help.

    Thanks

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