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: Low Fuel Light on with fuel in tank

The fuel level sensors on some of these vehicles tend to be misread by the computer, causing faults in the system. The fuel sensor would need to be inspected, and the engine computer scanned, to see if the codes received...

Q: Q: Car won't turn over

Hello, when a vehicle doesn't start,there are two things to check, the base engine and the electrical circuits to the starter motor. The base engine is easy to check, by seeing if the crank rotates with a ratchet and socket...

Q: Q: Car alarm going off for no reason

This could be caused by the hood switch. Hyundai has a technical service bulletin (9-BE-026) where the rubber bumper that keeps the hood switch depressed needs to be replaced with a new improved thicker one. My recommendation is to have...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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 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...