Key FOB Battery Died... - Drive Accord Honda Forums | radio-pro.ru
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post #1 of 57 Old 12-06-2015, 07:07 PM Thread Starter
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Key FOB Battery Died...

Hadn't driven car for a couple of weeks. Went to use it this afternoon and it started and ran okay but got a key fob battery low warning icon flashing on the dash. Was afraid to take it anywhere for fear it wouldn't start up again. Wth is this happening? Car's just under three years old and only about 25K miles. Would battery replacement be covered under warranty?


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Last edited by RickBlaine; 12-07-2015 at 05:34 AM. Reason: clarity in title
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post #2 of 57 Old 12-06-2015, 07:38 PM
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If it's the smart key and not the battery



Already got a warning on my wife's car and it's not even 6 months old. I'm guessing that the buttons got pressed while in her purse.

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post #3 of 57 Old 12-06-2015, 08:13 PM
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You guys (forum, not just you guys) know what to do if the fob battery is dead and you can't get in the car or start it (Smart Key users)?

The smart key has a metal key built in that you release by pushung the tab on the fob and insert the metal key in the door key hole. All smart entries I'm familiar with have this hidden key feature. It pays to RTM and inform other drivers. I just quizzed wifey yesterday and she remembered.

To start the engine with the dead smart key: Hold the fob next to the start button and start as usual. The Fob has a capacitor that transmits in close proximity even if the battery is dead.

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post #4 of 57 Old 12-06-2015, 08:15 PM
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Why worry? Even without the battery in the fob, you can still start the car as long as the fob is no more than an inch or two from the start button.

I keep a spare key fob sans battery sans key in the car. When traveling, I bring along a spare key in my backpack, or give it to my companion. If I misplace the main key fob, I use the spare key to unlock the door, get the spare key fob, and hold it near the start button to start the car.

The spare key fob inside the car has to be sans battery. Otherwise I can't lock the door or the trunk.

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post #5 of 57 Old 12-06-2015, 09:56 PM
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Quote:
Originally Posted by II Kings 9:20 View Post
The Fob has a capacitor that transmits in close proximity even if the battery is dead.
Quote:
Originally Posted by hdtouring View Post
Even without the battery in the fob, you can still start the car as long as the fob is no more than an inch or two from the start button.
Since it works without any battery at all, most likely there's an RFID chip in the fob, with a reader in the dash near the start button.

I'd be real careful if in this situation, because the usual protections against locking the fob in the car don't apply. As hdtouring said, keep the metal key separate from the dead fob: you'll need it to lock/unlock the doors.
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post #6 of 57 Old 12-07-2015, 04:49 AM
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Originally Posted by hdtouring View Post
Why worry? Even without the battery in the fob, you can still start the car as long as the fob is no more than an inch or two from the start button.

I keep a spare key fob sans battery sans key in the car. When traveling, I bring along a spare key in my backpack, or give it to my companion. If I misplace the main key fob, I use the spare key to unlock the door, get the spare key fob, and hold it near the start button to start the car.

The spare key fob inside the car has to be sans battery. Otherwise I can't lock the door or the trunk.
Good point on bringing spare. When we travel, we always bring the spare fob (with battery) and wifey keeps it in her purse. If you lose a modern chip key/fob on a road trip, you "ain't" getting home if it occurs on a weekend when dealers are closed. It will cost a few hundred ($400 with BMW) for a new fob. Always bring the spare. I have to give some thought to the fob in the car sans battery. Could easily keep it in a snack sized zip lock along with the battery out of the fob. That works for short trips of 30-70 miles where I don't bring a spare along.

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post #7 of 57 Old 12-07-2015, 04:53 AM
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I got about two years on the key fob battery. I drove by a Honda dealer on my way to work and the parts department man replaced the battery for me for $6. I was in and out in ten minutes.

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post #8 of 57 Old 12-07-2015, 05:12 AM
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You should replace keyfob batteries at 2 year interval or less and not wait for it to die.

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post #9 of 57 Old 12-07-2015, 05:52 AM
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$6 to replace a keyfob battery? Order them online and you could buy 10 batteries for that price. 1 small philips screw, pop the back off, remove/replace battery. It's not that hard folks.

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post #10 of 57 Old 12-07-2015, 06:01 AM
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Originally Posted by Accord2014LX View Post
$6 to replace a keyfob battery? Order them online and you could buy 10 batteries for that price. 1 small philips screw, pop the back off, remove/replace battery. It's not that hard folks.
Smart keyfobs do not have any screws.

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post #11 of 57 Old 12-07-2015, 06:01 AM
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Quote:
Originally Posted by hdtouring View Post
Why worry? Even without the battery in the fob, you can still start the car as long as the fob is no more than an inch or two from the start button.

I keep a spare key fob sans battery sans key in the car. When traveling, I bring along a spare key in my backpack, or give it to my companion. If I misplace the main key fob, I use the spare key to unlock the door, get the spare key fob, and hold it near the start button to start the car.

The spare key fob inside the car has to be sans battery. Otherwise I can't lock the door or the trunk.
Yes you can. You just lock the drivers door with the key and you can lock the fob in the car with the battery. This is how you lock the car while running, too.

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post #12 of 57 Old 12-07-2015, 07:29 AM
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Originally Posted by HondaGuy2 View Post
You should replace keyfob batteries at 2 year interval or less and not wait for it to die.
Good to know. Never replaced the battery in my TSX key fob after 7 years, same with my Accord... I guess these smart key fobs suck the juice much quicker.

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post #13 of 57 Old 12-07-2015, 07:31 AM
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Originally Posted by 08EX-L View Post
Good to know. Never replaced the battery in my TSX key fob after 7 years, same with my Accord... I guess these smart key fobs suck the juice much quicker.
It makes sense though, the key emits a signal the whole time, versus a normal fob would only emit when you press the button.
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post #14 of 57 Old 12-07-2015, 08:37 AM
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It makes sense though, the key emits a signal the whole time, versus a normal fob would only emit when you press the button.
Ya but you'd think Honda would find a battery that would last much longer and have longer change intervals than 2 years.

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post #15 of 57 Old 12-07-2015, 08:53 AM
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Ya but you'd think Honda would find a battery that would last much longer and have longer change intervals than 2 years.
Easy fix, except you'd end up with (1) $20 batteries and/or (2) a keyfob the size of an iPhone*.
At least the 2032s they use are available pretty much anywhere.

(*At some point, a car manufacturer is going to come out with a setup where your "car keys" are just a smartphone app. All things considered, I'd rather replace fob batteries every other oil change.)

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