Hello,
Thee is no ECU free key. All keys have an RF chip in them that is specific to the car. The security light is telling you this. You will need to get the car reprogrammed which will cost about $130.00 at the dealer or shop. Do you have the original key? If so I have seen people dig the chip out of the key and glue it to the new one.
Please let us know what happens.
Cheers, Ken
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Monday, September 3rd, 2018 AT 1:51 PM