Key fob i left my headlights on and ran car battery completly dead now key fob will not work, what can i do to fix thank you stewart

You need to have a mobile lock smith check it out , before changing the key fob battery did it unlock the vehicle ? Your actual key doesn't unlock the doors? Replacing the fob battery has nothing to do with it,it doesn't lose it's unique RF signal . you need a lock smith or depending where you at, tow truck drivers have the tools to open the vehicle,

Hi,

please take the key fob to your nearest advanced autoparts and ask them to pull out the battery for you. Then, you can test the key fob with the new battery. If it works, then your fob is fine. But if not, you would need to order a new key fob for your car.

Thank you.

check and test vehicle battery sounds like it might need replacement

I have a few tips you can try to fix your Toyota Matrix key fob.

Change the battery
Batteries don't last forever, you'll be surprised how often it's just a dead battery! Search YouTube channel on how to change a battery for your specific year, make, and model!

Wipe the board
The board inside your remote can get a lot more filthy than you think! When the board is dirty it can prohibit the contact to the circuit board when you push down on the button. Simply wiping the circuit board off can make your key fob like new again!
Get it checked
Go to your local hardware store like AutoZone or Oreilly's . They usually have a RF frequency tester. This little gadget will let you know if your key fob is sending a signal. If it is, you may need to reprogram your key fob to your vehicle

The old car battery reset trick
I know this sounds absurd, but it works sometimes and is worth trying. If you exhausted all of the options above, disconnect both terminals on your car battery for 10 minutes. Then reconnect them and try your key fob. This has worked for many people and I have no idea why. If you do, please comment below to explain.

New fob!
It might be time for a new key fob! No need to dread over the expensive costs of a new key fob, at Keyless Entry Remote Fob Inc., you can get a refurbished one for a very affordable price! You won't even be able to tell the difference. Just search your vehicle make, model, and year to purchase a key fob or give us a call at 402-671-5100.

Dead battery in the Key fob. Or the car battery is dead. There should be a slot on the lower left side of the dash. You slide the fob in buttons up key chain out. They had allot of problems with that system in 2008-2009.

Hi Julie, have the battery in your key fob replaced and if that is not the problem then have the car battery checked , charged or get someone to jump start your vehicle, don't worry this is not a major problem,
you just need some MALE help. Good luck!

I'm not a car mechanic, but, it sounds like you might want to check the fuse to the ignition switch, and, if that fails, it might be a problem with the Start Safety Switch on the transmission. Good luck.

in most cases you need to change the fob battery if you do need to be done in less than 10 sec if take longer need to be reprogram again now the problem is it only is going to work on the fob is working at moment the other is dead now it wil need reprogram

These C class Mercs are prone to many frustrating and often expensive electrical (and other) problems so be prepared if you hold on to the car.

i am afraid that complete failure of the key fob is common and the only fix is to have it replaced which will be expensive.

Sean

Either an interior light or head lights were left on all night, or there's a dead short in the electrical system, or... the battery completely failed internally such as a weak spot or defect in the plates. At any rate, it all obviously points to the battery. Replace the battery.