Why won't my fob work after I changed out the battery on my 2004 Prius?

The key less entry works to lock it and get in but, my fob won't work anymore.

jabberwoky Aug 08, 2014

Hi Anonymous, I want to help you with your question, but I need more information from you. Can you please add details in the comment box?

5 Related Answers

Anonymous

1861 Answers
Posted on Sep 17, 2008

Regarding the remote transmitter issue: Take the remote transmitter to your Toyota dealer. Ask them to test your transmitter with their hand-held RF detector. All Toyota dealers are required to have one of these devices. The RF detector will test the remote to see if it is indeed transmitting the proper RF out of the transmitter, and the strength of the RF signal. If there is no signal, the remote has failed (unfortunatly common), and the remote will need to be replaced and reprogrammed to the vehicle. I do this quite regularly, and rarely do I tell customers taht they need to spend 800 dollars for such a simple diagnosis/fix. The keyless system is very reliable. I rarely change the ECU for the keyless, unless somebody somehow gets the ECU wet, then it def needs replaced. Hope this helps.

Anonymous

318 Answers
Posted on Jul 18, 2009

SOURCE: toyota corolla verso 7 seater fob wont lock or unlock key wll

Battery of fob must be strong to work. You can try reinitialising the fob.

Anonymous

9 Answers
Posted on Aug 20, 2009

SOURCE: 2004 Toyota Camry key fob programation

sit in car all doors closed put key in ignition and turn from OFF to ACC 3 times as fast as you can leaving it in ACC on the last cycle then press your remote button. your blinkers should flash to tell you this has worked.... may take you a couple of tries to get it!!

Anonymous

163 Answers
Posted on Dec 30, 2009

SOURCE: my toyota 2007 yaris 4dr sedan keyless entry not working

they may need to recode your pad see dealer

Anonymous

1 Answer
Posted on Jan 29, 2010

SOURCE: toyota sienna interior lights not working

The problem is in the sunvisor light. You will have to take the light assembly off and you will find wires have become disconnected.

Daviscacare.com
757-689-4701

Add Your Answer

Upload

Upload an image from your computer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

Loading...

Include an image. It's worth a thousand words.

prev next

Related Questions:

0helpful

1answer

Key fob useless on Saturn Vue 2005

thats how key entry works as to fob -dead battery--failure

Read full answer

Dec 22, 2021 • Saturn Cars & Trucks

1helpful

2answers

How do you syncronize the ford courier key with the car for central locking

Hello Madonna Goulding

I'd would need to have the year of your FORD to be
sure on telling you how to proceed... but a battery change
should not affect the existing coding.

It sounds as though you are mixing your question about
KEYLESS entry (FOB)... and your
PASSIVE ANTI-THEFT SYSTEM (PATS) KEYS.

For security purposes...
BOTH of your original keys must be present...

You can... and SHOULD have more than two keys
but you can NOT have LESS THAN two keys to
do any PROGRAMMING, ADDITIONS or modifications.

(FOBS or KEYs)...
YES... YOU DO HAVE A "FOB"... but yours is added to your KEY-TOP... treat it the same (I believe your manual refers to it as a keyless "REMOTE"
(attached key notwithstanding).

THIS is the design INTENT... to prevent
valets, garages... or ANY UNAUTHORIZED person from
creating UNAUTHORIZED SPARE KEYS.

The cloning process is in your OWNES MANUAL.

If you do not have TWO KEYS you MUST go to a
LOCKSMITH or a DEALERSHIP to REGAIN your TWO KEY
functionality...

Read full answer

Dec 08, 2016 • Ford Cars & Trucks

0helpful

1answer

Is there a way to reset keyless entry for 04 endeavor?

Search Results

2004 Mitsubishi Endeavor Key Fob Remote Programming ...

keylessentryremote

2004

endeavor

Mitsubishi - Free Keyless Remote Fob Entry programming .

How To Replace Mitsubishi Endeavor Key Fob Battery 2004 ...

? 2:04

Read full answer

Nov 01, 2015 • Cars & Trucks

0helpful

1answer

An 08 prius keyless entry doesn't work, changed the batteries, pushed the disable button and reset it, still no go. Any ideas?

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.

Read full answer

Jul 17, 2014 • 2008 Toyota Prius

0helpful

1answer

KEY LESS ENTRY

dead battery in fob or need to reprogram fob or system failure

Read full answer

Aug 29, 2017 • Mercedes-Benz C230 Cars & Trucks

0helpful

1answer

Saab experts

May be keyfob needs reprogramming.

Keyfob remote reprogramming is not very difficult but on some cases it can be done by dealer service tools.

If the remote s faulty then key fob will not get programmed.

Insert the key in ignition. Turn the key to on position, and cycle the key three times off-on-off-on-off-on. Then with the key fob remote select your remote and then try to operate the vehicle with remote.

These are just the basic procedure, but sometimes it will not help.

On that case dealer is the only option.

---------

There are few much related troubleshooting links mentioned below for remote key fob reprogramming. I suggest you to go through the list and click the link below to go through its details and procedure: -------

Theft indicator not letting car to start?

http://technoanswers.blogspot.in/2012/02/theft-indicator-not-letting-car-to.html

-------------

2009 Toyota Highlander: Smart Key Not getting Detected?

http://whatisbyme.blogspot.in/2012/05/2009-toyota-highlander-smart-key-not.html

----------

2007 Toyota Prius: Reprogram Remote Keyfob?

http://whatisbyme.blogspot.in/2012/05/2007-toyota-prius-reprogram-remote.html

-----------

Pin that holds the flick key part to the key fob?

http://whoisbyme.blogspot.in/2012/07/pin-that-holds-flick-key-part-to-key-fob.html

-------------

2006 Toyota Hilux: Programming New Key?

http://technoanswers.blogspot.in/2012/04/2006-toyota-hilux-programming-new-key.html

----------

Where is Key chip memory located on 2004 ford Freestar?

http://technoanswers.blogspot.com/2012/01/where-is-key-chip-memory-located-on.html

----------

Ford Keyless Remote Fob Reprogramming?

http://schematicsdiagram.blogspot.com/2011/12/ford-keyless-remote-fob-reprogramming.html

----------

After getting car washed, check engine light is ON and key less entry not working, tried reprogramming. Also car shows fuel pressure?

http://schematicsdiagram.blogspot.com/2011/12/after-getting-car-washedcheck-engine.html

-----------

Audi A8 Key Fob Programming?

http://technoanswers.blogspot.com/2011/12/audi-a8-key-fob-programming.html

----------------

Oldsmobile Aurora Key Fob Reprogramming?

http://technoanswers.blogspot.com/2011/12/olds-aurora-key-fob-reprogramming.html

-------------

Buick Lesabre Key Fob Reprogramming?

http://technoanswers.blogspot.com/2011/12/buick-lesabre-key-fob-reprogramming.html

---------------

Keyfob remote not working on 2003 Ford E350 Econoline?

http://technoanswers.blogspot.in/2012/01/keyfob-remote-not-working-on-2003-ford.html

-----------

KeyFob will open the doors but not start on BMW?

http://technoanswers.blogspot.in/2012/02/key-will-open-doors-but-not-start-on.html

------------

Mitsubishi Car Key Not getting detected after replacing ECM

http://repairhelpcenter.blogspot.com/2012/11/mitsubishi-car-key-not-getting-detected.html

-----------

Key Fob will not lock and unlock doors?

http://technoanswers.blogspot.in/2012/02/key-fob-will-not-lock-and-unlock-doors.html

-------------

2000 Jeep Cherokee Limited: KeyFob Remote Not Working?

http://schematicsdiagram.blogspot.in/2012/06/2000-jeep-cherokee-limited-keyfob.html

-----------

Chevrolet Malibu: Key Stuck in ON position?

http://technoanswers.blogspot.in/2012/04/chevrolet-malibukey-stuck-in-on.html

-----------

2012 Dodge Ram: Ignition Key will not release?

http://whoisbyme.blogspot.in/2012/07/2012-dodge-ram-ignition-key-will-not.html

--------------

These details will help.

Thanks.

Read full answer

Dec 04, 2012 • Cars & Trucks

0helpful

1answer

Peugeot 206 key fob

Try with brand new key fob battery and see.If that helps.
Otherwise May be keyfob needs to be reprogrammed.

KEYFOB PROGRAMMING

Keyfob remote reprogramming is not very difficult but on some cases it can be done by dealer service tools.

If the remote s faulty then key fob will not get programmed.

These are just the basic procedure, but sometimes it will not help.

On that case dealer is the only option.

---------

2009 Toyota Highlander: Smart Key Not getting Detected?

http://whatisbyme.blogspot.in/2012/05/2009-toyota-highlander-smart-key-not.html

----------

2007 Toyota Prius: Reprogram Remote Keyfob?

http://whatisbyme.blogspot.in/2012/05/2007-toyota-prius-reprogram-remote.html

-----------

Pin that holds the flick key part to the key fob?

http://whoisbyme.blogspot.in/2012/07/pin-that-holds-flick-key-part-to-key-fob.html

-------------

2006 Toyota Hilux: Programming New Key?

http://technoanswers.blogspot.in/2012/04/2006-toyota-hilux-programming-new-key.html

----------

Where is Key chip memory located on 2004 ford Freestar?

http://technoanswers.blogspot.com/2012/01/where-is-key-chip-memory-located-on.html

----------

Ford Keyless Remote Fob Reprogramming?

http://schematicsdiagram.blogspot.com/2011/12/ford-keyless-remote-fob-reprogramming.html

----------

After getting car washed, check engine light is ON and key less entry not working, tried reprogramming. Also car shows fuel pressure?

http://schematicsdiagram.blogspot.com/2011/12/after-getting-car-washedcheck-engine.html

-----------

Audi A8 Key Fob Programming?

http://technoanswers.blogspot.com/2011/12/audi-a8-key-fob-programming.html

----------------

Oldsmobile Aurora Key Fob Reprogramming?

http://technoanswers.blogspot.com/2011/12/olds-aurora-key-fob-reprogramming.html

-------------

Buick Lesabre Key Fob Reprogramming?

http://technoanswers.blogspot.com/2011/12/buick-lesabre-key-fob-reprogramming.html

---------------

Keyfob remote not working on 2003 Ford E350 Econoline?

http://technoanswers.blogspot.in/2012/01/keyfob-remote-not-working-on-2003-ford.html

-----------

KeyFob will open the doors but not start on BMW?

http://technoanswers.blogspot.in/2012/02/key-will-open-doors-but-not-start-on.html

------------

Mitsubishi Car Key Not getting detected after replacing ECM

http://repairhelpcenter.blogspot.com/2012/11/mitsubishi-car-key-not-getting-detected.html

-----------

Key Fob will not lock and unlock doors?

http://technoanswers.blogspot.in/2012/02/key-fob-will-not-lock-and-unlock-doors.html

-------------

2000 Jeep Cherokee Limited: KeyFob Remote Not Working?

http://schematicsdiagram.blogspot.in/2012/06/2000-jeep-cherokee-limited-keyfob.html

-----------

Chevrolet Malibu: Key Stuck in ON position?

http://technoanswers.blogspot.in/2012/04/chevrolet-malibukey-stuck-in-on.html

-----------

Theft indicator not letting car to start?

http://technoanswers.blogspot.in/2012/02/theft-indicator-not-letting-car-to.html

-------------

2012 Dodge Ram: Ignition Key will not release?

http://whoisbyme.blogspot.in/2012/07/2012-dodge-ram-ignition-key-will-not.html

--------------

These details will help.

Thanks.

Read full answer

Nov 28, 2012 • Peugeot Cars & Trucks

10helpful

1answer

My Prius 2006 will not start with the remote not in the key hole.

I had the same problem with 2007 Prius.
Before doing the resetting procedure, look under the steering wheel and see if there is a "key" button. Mine had been pushed in,inadvertently during an inspection, which immobilized the "smart" operation. Simply pushing the button solved the problem.

Read full answer

Jun 02, 2012 • 2006 Toyota Prius

0helpful

1answer

My key less entry is not locking/unlocking my car doors. I discover the problem this morning when I tried to open my car. I had to put the key in the lock and open it that way. It also doesn't making...

change battery in remote

Read full answer

Sep 09, 2011 • 2004 Honda Civic

0helpful

1answer

I have a 2004 Malibu Maxx. The keyless entry does not work to lock the door or start the vehicle. Everything else works. Same scenerio on both key fobs. The battery is good. The program has been...

bad key fob OR maybe just the rubber pad .....I ordered 1 on line to see if that solves the problem.. doo dah!

Read full answer

Nov 04, 2010 • 2004 Chevrolet Malibu

Not finding what you are looking for?

View Most Popular

2004 Prius

Cars & Trucks

Key fob useless on Saturn Vue 2005

Saturn Cars & Trucks

82 views

Ask a Question

Usually answered in minutes!

Have a manual for 2004 Toyota Prius? Or just drag it here!

Related Topics:

Why won't my fob work after I changed out the battery on my 2004 Prius?

5 Related Answers

Add Your Answer

Attachments: Added items

Related Questions:

Key fob useless on Saturn Vue 2005

How do you syncronize the ford courier key with the car for central locking

Is there a way to reset keyless entry for 04 endeavor?

An 08 prius keyless entry doesn't work, changed the batteries, pushed the disable button and reset it, still no go. Any ideas?

KEY LESS ENTRY

Saab experts

Keyfob remote reprogramming is not very difficult but on some cases it can be done by dealer service tools.

Theft indicator not letting car to start?

2009 Toyota Highlander: Smart Key Not getting Detected?

2007 Toyota Prius: Reprogram Remote Keyfob?

Pin that holds the flick key part to the key fob?

2006 Toyota Hilux: Programming New Key?

Where is Key chip memory located on 2004 ford Freestar?

Ford Keyless Remote Fob Reprogramming?

After getting car washed, check engine light is ON and key less entry not working, tried reprogramming. Also car shows fuel pressure?

Audi A8 Key Fob Programming?

Oldsmobile Aurora Key Fob Reprogramming?

Buick Lesabre Key Fob Reprogramming?

Keyfob remote not working on 2003 Ford E350 Econoline?

KeyFob will open the doors but not start on BMW?

Mitsubishi Car Key Not getting detected after replacing ECM

Key Fob will not lock and unlock doors?

2000 Jeep Cherokee Limited: KeyFob Remote Not Working?

Chevrolet Malibu: Key Stuck in ON position?

2012 Dodge Ram: Ignition Key will not release?

Peugeot 206 key fob

Keyfob remote reprogramming is not very difficult but on some cases it can be done by dealer service tools.

2009 Toyota Highlander: Smart Key Not getting Detected?

2007 Toyota Prius: Reprogram Remote Keyfob?

Pin that holds the flick key part to the key fob?

2006 Toyota Hilux: Programming New Key?

Where is Key chip memory located on 2004 ford Freestar?

Ford Keyless Remote Fob Reprogramming?

After getting car washed, check engine light is ON and key less entry not working, tried reprogramming. Also car shows fuel pressure?

Audi A8 Key Fob Programming?

Oldsmobile Aurora Key Fob Reprogramming?

Buick Lesabre Key Fob Reprogramming?

Keyfob remote not working on 2003 Ford E350 Econoline?

KeyFob will open the doors but not start on BMW?

Mitsubishi Car Key Not getting detected after replacing ECM

Key Fob will not lock and unlock doors?

2000 Jeep Cherokee Limited: KeyFob Remote Not Working?

Chevrolet Malibu: Key Stuck in ON position?

Theft indicator not letting car to start?

2012 Dodge Ram: Ignition Key will not release?

My Prius 2006 will not start with the remote not in the key hole.

My key less entry is not locking/unlocking my car doors. I discover the problem this morning when I tried to open my car. I had to put the key in the lock and open it that way. It also doesn't making...

I have a 2004 Malibu Maxx. The keyless entry does not work to lock the door or start the vehicle. Everything else works. Same scenerio on both key fobs. The battery is good. The program has been...

Not finding what you are looking for?

2004 Prius

Key fob useless on Saturn Vue 2005

Ask a Question

Popular Questions

I have Toyota Prius. I got $7e8 engine code. What's that mean, please?

Prius high beam lights work but low beam lights do not work?

The car alarm keeps going off in my 2006 Toyota

2007 prius master warning light, (!), VSC and engine light on

2002 toyota prius warning light - car with exclamation mark

Check Out the Latest Top Trucks Report!

Top Toyota Experts

ZJ Limited

Thomas Perkins

ROBERT GARCIA

Are you a Toyota Expert? Answer questions, earn points and help others

Manuals & User Guides

This is the latest Student Handbook...

This doc is provided by Toyota...