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.

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?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Anti-theft alarm won't allow car to start.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Battery is dead and when I jump it it runs but after I turn key off it won't start again

Jump starting a vehicle relies on the "jumper car" and not the car that is dead. By using the jumper vehicle, your battery gets power from the other car. Once your car is running, if the battery is good, it...

Q: The car won't start, battery works

Hi there. If the battery is fine, then it may be a bad battery cable, starter, or even the security system. I usually try a spare key if there is one and also try starting it in neutral to make...

Q: Car tries to die when I give it some gas.

A unmetered air leak can cause this symptom of the engine sputtering or dying on acceleration. Rubber intake boots and vacuum lines need to be checked for leaks. If no obvious leaks are detected then the intake system may need...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.