Skip the auto shop - Our mechanics make house calls

Q: Car alarm won't turn off.

asked by on

My car alarm is malfunctioning. It won't turn off and the car is not starting.

If the alarm is an aftermarket alarm then if may just be defective. I have found that most alarms made aftermarket do not last long and are made of cheap relays and circuits. If you have a factory alarm then you may have a defective remote or a door switch if you used a key to open it. The system needs a code key to disable the ignition and if the key is defective it may be the cause. Try a second key and see if that works. It has to be a key that is already coded to the vehicle to work. If none of this works then give a certified mechanic a call, like one from YourMechanic, to come and diagnose your problem.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Antijacking component

The anti-theft system may be experiencing a fault and in most cases will store a code pointing to the problem component. I recommend having a technician experienced in vehicle electrical systems check the vehicle and read fault codes. They will...

Q: truck trying to die at a red light and when i first start it up

The problem is most likely carbon build up in the throttle body and the idle air control valve which may be sticking closed. Try and clean the throttle body and idle air control valve. Also, clean the mass air sensor...

Q: Overdrive stuck on OFF

Hello. The button itself might be damaged. Every switch and button accessible to the driver will have a way of being serviced. It's just a matter of what panels or access points you have to get into in order to...

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...