Replaced battery and won't start?

Tiny
KEVDOGG1
  • MEMBER
  • 2011 KIA SORENTO
  • 2.4L
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 162,000 MILES
Car just clicked replaced battery hooked up cables and horn started honking and lights started flashing. Put the key in the door unlocked it got in put the key in the ignition turned to run didn't stop alarm. Tried to start and nothing. Tried the lock unlock with the remote and nothing.
Sunday, January 25th, 2026 AT 10:41 AM

5 Replies

Tiny
KRAKENAUTO
  • MECHANIC
  • 83 POSTS
You have likely tripped the immobilizer. Ensure your terminals are tight and not corroded. Do you notice if there's a security light flashing on the dashboard?
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Monday, January 26th, 2026 AT 8:00 AM
Tiny
KEVDOGG1
  • MEMBER
  • 3 POSTS
No security light flashing but the dash is flashing horn is honking and hazard lights are flashing. Battery cables are tight and clean.
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Tuesday, January 27th, 2026 AT 7:17 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,877 POSTS
Okay, disconnect the battery again and do a hard reboot for the system, this video will show you how.

https://www.youtube.com/watch?v=INiDRO5A5MY

Please go over this guide and get back to us.
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Wednesday, January 28th, 2026 AT 8:56 AM
Tiny
KEVDOGG1
  • MEMBER
  • 3 POSTS
I have tried that several times with no luck.
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Wednesday, January 28th, 2026 AT 9:17 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,877 POSTS
Okay try this

Driver Door ONLY (not passenger):

1. Close all doors
2. Insert key in driver door lock
3. Turn key to UNLOCK position
4. Hold it there for 30 seconds
5. Return to center
6. Lock door
7. Unlock again
8. Try starting

This sends a “valid owner” signal directly to the Body Control Module (BCM)

Let me know what happens.
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Wednesday, January 28th, 2026 AT 9:41 AM

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