Skip the auto shop - Our mechanics make house calls

Q: Alarm goes off suddenly

asked by on

My car has a factory alarm, which I never had a remote for. I never needed it and I would always manually lock the car. The other day, I locked the car as I usually do and went home, but the alarm went off out of the blue. I tried to unlock and lock the car again but it did the same thing. What should I do? Is there any way I could disable the alarm or any other solution?

A: Hello. It sounds like your Lexus SC400’s im...

Hello. It sounds like your Lexus SC400’s immobilizer in the alarm system is working intermittently and in need of repair. It is possible for you to disable the alarm system, but this is not a simple job and therefore not recommended. Factory alarms are not meant to be bypassed. Have a certified technician, like one from YourMechanic, assist you in the repair of your alarm system immobilizer.

Was this answer helpful?

A: Hello. It sounds like the immobilizer in th...

Hello. It sounds like the immobilizer in the alarm system is working intermittently and in need of repair. It is possible for you to disable the alarm system, but this is not a simple job and therefore not recommended. Factory alarms are not meant to be bypassed. Have a certified technician, like one from YourMechanic, assist you in the repair of your alarm system immobilizer.

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: While driving, hit start/stop button, instead of radio button

Not that I can find. The Start/Stop button, and how long it must be held to turn the engine off in an emergency is a hot topic. Requiring the driver to hold this button down for 3 seconds could be...

Q: My temperature goes up higher when I'm driving

Hello. There are several possibilities here for overheating. These range from the thermostat simply failing in the "closed" position, to a clogged or corroded radiator, a radiator fan (electric) is not coming on when it should, or the engine having...

Q: New alternator is loose

The alternator locking sleeves should be moved all the way away from pulley side before installation. Also, check the mounting bosses and make sure they are the same thickness. If you'd like some assistance with this, consider YourMechanic, as a...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...