Skip the auto shop - Our mechanics make house calls

Q: Anti-theft alarm won't allow car to start.

asked by on

The batteries in the key fob for the car have died. We tried using the key to unlock the door, but the alarm just keeps going off. Once the alarm eventually shuts off, the engine still won't start. We can't exactly go buy new batteries for the key fob without driving there and don't have another vehicle to do so either. We've been trying to work around this for almost 24 hours now and can't seem to figure out any way to start the car.
My car has an automatic transmission.

A: If you can, try to lock the doors with the ...

If you can, try to lock the doors with the key and then wait for the alarm to set. Then unlock the drivers door with the key. This should disable the alarm. If it does not, then try doing the same but using the passenger door. If it still does not work, then you will need to get a battery for the key fob if this is the only way for the alarm to be disabled. If this is a non-factory alarm, then you should have a small reset button under dash that will reset alarm when key is set to On position. For the new key fob battery, you could always try asking a friend for a ride, use a ride-sharing application, or use public transportation to get to a location that can provide the new key fob battery.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Serpentine Belt Keeps Breaking and want to know if the Tensioner pulleys could be the cause.

Either the drive belt tensioner is binding or one of the pulleys are binding. Also, check the accessories for any binding. This is only the way the belt can break. If you still need help, I would have the problem...

Q: Can't lock car

Hello. If your key is no longer working with the lock cylinder in the vehicle, it may be possible that the cylinder needs to be replaced. This means that you would need a new key for the new cylinder, and...

Q: Gauges not working

Hi. The system uses a speed sensor mounted on the transmission that sends a signal to the speedometer and odometer to make them function correctly. If no signal is sent, then the gauge will not work. However, if the signal...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...