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2005 hyundai sonata, can't reset theft-alarm system after battery replacement

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Posted on Jan 02, 2017

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SOURCE: my 2006 hyundai sonata alarm keeps going off

One word:


Next time just disconnect the battery until you get it towed as this is a warranty item. I'll bet some wondered if this was a prank question like I did, right?

Posted on Nov 22, 2008

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SOURCE: How to reset anti theft in 97 Eclipse

dealer only

Posted on Feb 13, 2009

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If the alarm keeps going off constantly and the remote has no influence on the alarm its most likely a connection problem. A hyundai dealer might be able to fix it but since you can start the car something you might be able to try is....
Check and make sure the remote battery is in the right way. Make sure all of the doors are closed, the trunk is closed, open the hood, connect the battery, close the hood all the way and try to lock and unlock the doors. Hope this works but if not, sorry it didn't work.

Posted on Jul 08, 2009

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SOURCE: how do you reset the check engine light on hyundai sonata?

Just disconnect your battery for a couple of minutes.

Posted on Jul 20, 2009

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SOURCE: Need color codes for 2005 hyundai sonata stereo

Here's the wiring diagram


Posted on Oct 25, 2009

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1 Answer

What would cause a Hyundai sonata not to start after sitting over night

if you haven't left any thing on over night you may have a weak battery or bad connections to the battery, the alternator may have a blown diode and will not charge the battery full. these are just some small remedies, if none of those are the problem it can get heavy like a short in the system or something draining it like an alarm. if thats the case i would take it in for diagnosis.

Oct 20, 2014 | 2005 Hyundai Sonata

1 Answer

2001 Hyundai Sonata alarm system constantly goes off every time door is opened. Have tried resetting the alarm with key fob and using combinations of turning the key in the ignition, but nothing. Battery...

If it affects no other systems,try pulling the fuse to it..but only if it isnt also the fuse for say,the steering wheel lock...etc..good luck..Beyond that,suspect a short circuit in the system

Nov 01, 2013 | 2001 Hyundai Elantra

1 Answer

Car wont start

Could be the anti-theft system. Have you tried another key ?

Jun 11, 2013 | 2005 Hyundai Sonata

1 Answer

2004 hyundai sonata anti theft car alarm solution

Per my local dealership this problem has been identified by Hyundai and a service bulletin released. There is a plunger-type limit switch under the hood (passenger side front corner - easy to see) that isn't being depressed enough by a small rubber bumper attached to the underside of the hood. The fix is to replace the existing bumper with one that is slightly longer. The replacement part number is 92736-3M000 "Pad-Lid Switch". It cost me 80 cents with tax. Just pull the old one out and push the new one in.

Mar 13, 2012 | Hyundai Sonata Cars & Trucks

1 Answer

When i try to start me 2008 sonata the alarm goes off and the engine will not turn over. what can i do?

Your Sonata is equipped with a "Keyless Entry & Burglar Alarm" system. When the Burglar Alarm is activated, it KILLS the starting system through the used of a relay called the "Burglar Alarm Relay". This mode prevents engine starting with the key.
Solution #1
Disarm the system with the Keyless Remote (key fob) If you don't have this remote (or its battery is dead) replace the battery & try disarming again.
Solution #2
Enter the vehicle & insert the key in the ignition and turn the ignition switch to 'RUN'. Wait 3 to 5 minutes until the alarm stops. You should then be able to start the engine.

Have a qualified/certified Hyundai Service Technician properly diagnose this issue.

Sep 07, 2011 | Hyundai Motor 2004 Sonata

1 Answer

How to shut the alarm on 2005 Hyundai sonata

no valet switch,you will have to replace batteries/keypad to make it work and you CANNOT bypass the system......otherwise whats the point in fitting it??

Jun 26, 2010 | 2005 Hyundai Sonata

1 Answer


you have to reset the alarm system every time the battery is replaced/disconnected...

Apr 13, 2010 | 2006 Hyundai Sonata

1 Answer

2004 Sonata Alarm

Yes!... reset the alarm with the fob!

Aug 02, 2009 | 2005 Hyundai Sonata

2 Answers

Disarm alarm on a 2004 sonata

welcome to the modern world. If you forget to arm it, it does it by itself.

Its part of immobilizing, to prevent car theft which costs us all

Sep 10, 2008 | Hyundai Motor 2004 Sonata

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