Q: Battery went flat causing alarm to sound and won't stop after changing battery

asked by on

My 318i alarm decided to start going off and would not turn off with key. I recharged battery and when hookup terminals horn goes off. How do I reset
My car has an automatic transmission.

The most common methods to deal with this situation are to put the key in each door and lock and unlock to reset the alarm. You may need to do this in the trunk or hatch lid as well. The second method is to disconnect the battery, put the key in the ignition, turn it to run and reconnect the battery. Once the battery is connected, start the car. If either of these do not work, you will need to contact someone to diagnose the alarm system. Diagnosis of alarm systems takes an experienced technician. It involves a scanner, knowledge of automotive electronics systems as well as experience with your particular make and model.

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. Battery went flat causing alarm to sound and won't stop after changing battery

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: Q: Turn the key, nothing happens

What you are describing sounds like a faulty starter solenoid. A faulty starter solenoid will generally produce a clicking sound when turning the key. The starter solenoid is located on the starter and has internal electrical contacts that transmit electricity...

Q: How much would it cost to have the SCR metering valve cleaned/unclogged? I have a 2011 bmw 335d and the sea light code is p20ee

Hi Zach. I've forwarded your question to our sales and service department, as this repair is not listed on our normal mobile mechanic service offerings. If we're able to offer this service, they will contact you directly via email. Thanks!...

Q: Door ajar light is on and the cab lights won't turn off while driving

Hi there. From the description you have provided, this is probably the result of a failed door ajar light switch. The door ajar switch is part of the door latch assembly. It may have to be replaced as an assembly....

Related articles

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...
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...
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.