If you're encountering issues programming a spare key for your sled using a Map Tuner X, here are a few steps you can try:
1. Make sure the key is a genuine key for your sled and not a counterfeit or a key from another sled with a different electronic control unit (ECU).
2. Check the key's battery to ensure that it is fresh and functioning properly.
3. Make sure that you are using the correct programming procedure for your sled and Map Tuner X. You may need to refer to the user manual for both the sled and the Map Tuner X to ensure that you are following the correct steps.
4. Try to reset the ECU of your sled. This can often resolve any communication issues between the key and the sled's control system.
If the above steps don't work, you may need to take your sled to a professional
locksmith Hither Green who has experience with programming keys for your specific make and model.
If the keys are the same, you can only program one of the keys and discard the other one. If the key still doesn't work after programming, it may be faulty and you should consider getting a new key.
