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Q: Our Alero will not start until we put the key in the ignition & wait 10 minutes. on 2004 Oldsmobile Alero

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After the 10 minutes it will start. It used happen once in a while and now it has been happening more frequently. We are told it has someone to do with the security system.
(1) Answer
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The key has a chip inside that the car must detect before it will let it start. There is a passlock sensor in the ignition lock cylinder that may be failing causing the anti-theft system to not recognize the key chip.
The sensor will cost around $100. Not sure about labor. You may be able to find the fix on YouTube.