Skip the auto shop - Our mechanics make house calls

Q: I have a anti theft system installed in my car where you need to have the key in it before u can start the car.

asked by on

Alarm installed under ignition. I believe after having battery issues it may interfered with the anti theft .

My car has 260000 miles.
My car has an automatic transmission.

Hi there. Check the battery cables and make sure that they are tight and clean. If you had replaced your battery, then with an aftermarket alarm, it is best to disable the alarm before hooking up a new battery. This will prevent the alarm from suddenly setting it self off. Plus, by disconnecting the alarm you can re-enable the alarm as if it was installed. This will make the alarm be like new again but not go off. If you need further assistance with your anti-theft system, then seek out a professional, such as one from Your Mechanic, to help you.

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!
  1. Home
  2. Questions
  3. I have a anti theft system installed in my car where you need to have the key in it before u can start the car.

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: Starter is loose

Hello a loose starter is something you should have repaired and inspected sooner than later to avoid damage to where the starter mounts. If the starter brakes it mounting tabs or cracks the mount, the repair could be expensive due...

Q: How do I use the rear armrest and pass through?

The rear seat of your car is designed with a built-in armrest and cup holder. It folds back into the seat when not in use. If it is in use, the center seat cannot be used (you’ll be limited to...

Q: Ignition was destroyed by crook can I start this motor?

If your car has a factory installed anti-theft system, starting the car is much more difficult. The anit-theft system uses the ignition key, ignition lock cylinder and switch to determine if the car will be allowed to start. There are...

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...
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...
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...