Santa Fe 2019 Spare key sounds an alarm and wont start car

Asked by teddrummer Nov 11, 2022 at 05:48 PM about the 2019 Hyundai Santa Fe

Question type: General

I could not find my FOB so I opened the locked door with my spare key I had
made a few months ago (not a FOB). When I tried to start the car with spare
key, the alarm sounded and car would not start
Yet I know the spare key works in normal conditions  i.e. when I use it when
the doors are not locked.  I finally found FOB the next day, but worried how
to get around that situation if it happens again!

2 Answers
307,225

Gene answered about a year ago

The spare key has not been programmed so the security system would not allow the engine to run. The dealer or a smart locksmith can fix this for you.

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202,315

Ed92626 answered about a year ago

You never make a spare key without a fob. It's like using the key inside the fob but without the signaling to the car that it's a good key. Using the key alone trips the anti-theft program. You're lucky the car got out of security ode when you found the fob. Otherwise, you'd need a dealer or locksmith to cancel security.

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