Question about Hyundai Sonata

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I have a 05 hyundai sonata. I put a new battery in now the alarm goes off and I don't have a remote. Car wont start

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If it is an after market alarm you should be able to remove the in-line fuse from the power line to the alarm and solve the problem. Since you don't have the remote this was a problem anyway since if the alarm was triggered it would leave you stranded. It sounds like the starter kill switch is engaging. The key in the ignition should reset the alarm but sometimes they don't. You can try disconnecting the Positive cable from the battery and grounding it for 30 sec then reconnect it if the alarm is built in by the factory.

Posted on Jan 03, 2011

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How do you get a 2004 hyundai sonata to start after new battery was installed causing the alarm to keep going off.


have you tried locking and unlocking the car with the remote. How about locking and unlocking the drivers front door with the key?

Oct 02, 2015 | Hyundai Motor 2004 Sonata

1 Answer

Alarm went off and now car won't start.


You are most likely correct, it probably has an alarm. Unfortunately, most alarm systems are connected to the remote that is broken. You should have to have your dealership get you a new remote for the vehicle.

Mar 07, 2015 | Hyundai Motor 2004 Sonata

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

I dont have the remote to the stock alarm on my 2003 hyundai sonata and my alarm wont turn off and my car wont start


I know this sounds obvious, but did you run your battery dead? If you don't know, get the battery checked.as for as tuning off the alarm... Just simply disconnect your negative battery cable. This will reset the alarm. This doesn't solve the problem but makes it less annoying while figuring it out. What about the battery in your remote, is it dead? Look for any wires from the alarm that may be frayed, cut, or corroded. Hope this helps.

Aug 27, 2011 | Hyundai Sonata Cars & Trucks

2 Answers

I have a 2003 hyundai sonata and i dont have the remote for the stock alarm. My alarm keeps going off and my car wont start. I bought a new battery and even tried the key in the door still no luck.....


The 2003 Sonata is equipped with a 'starter KILL' burglar alarm system with disables the starting system (using a N/C 'contacts' configuration instead of a N/O contacts configuration). N/C=Normally closed, and N/O=Normally open contacts. When the alarm goes off with a MY Sonata, the only way to DISARM it is with the key fob (remote) originally programmed for it (unless you purchase a new remote & have it programmed for the vehicle at an authorized Hyundai Service Department). NOTE: So long as the keyless entry & burglar alarm system is functioning/operating normally, the alarm will keep going off and the STARTER KILL function will still prevent you from starting the vehicle. One option is left without purchasing a new remote and having it programmed.
1. When the alarm goes off, get into the vehicle and insert the ignition key into the ignition.
2. Turn the key to the 'RUN' position (NOT the ACC position) and wait for the alarm to STOP (usually about 3 to 5 minutes).
3. The engine should then start using the ignition key.

If this procedure doesn't work, the problem will need further diagnosis by a qualified/certified Hyundai Service Technician.

Hope this helps

Aug 27, 2011 | 2003 Hyundai Sonata

1 Answer

2004 Sonata Alarm


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

Aug 02, 2009 | 2005 Hyundai Sonata

1 Answer

Car wont start


Sounds like you have a shorted wire causing a drain. I recommend disconnecting the alarm all together which should stop the short so battery can remain fully charged.

Jul 09, 2009 | Hyundai Motor 2002 Sonata

1 Answer

My 2002 sonata alarm wont shut off and my keyless wont stop it and the car also wont start with the key either


When the alarm is activated, there is an Anti-Theft device (Starter Kill Relay) which prevents anyone from starting the engine using the key (about 5 minutes). If you place the key in the ignition and turn the key to the "RUN" position, wait 5 minutes (approx), the engine should then be able to start. If not, the problem may be the ETACS (Electronic Time & Alarm Control System) module. If it does start, the problem may simply be that the battery in the keyless remote is weak/dead, or the remote needs to be programmed again for that vehicle. Only the remote can 'DEACTIVATE' the alarm. Best solution, take/tow the vehicle into a Hyundai Service Center (dealership), pay the diagnostic fee. They will tell you EXACTLY what the problem is and what's needed to fix it (parts, labor, tax, time-frame, etc.).
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Jun 14, 2009 | Hyundai Motor 2002 Sonata

1 Answer

My 2006 hyundai sonata alarm keeps going off


One word:

Dealer.

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?

Nov 17, 2008 | 2006 Hyundai Sonata

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