>>28530599>>28530580>>28529734Likely you have a bad module (the reader for the system) or you just need to do the first step, and wait. Try this first, turn to accessory on for 10 until bitch stops blinking. Wait another 10 fore retrying. If this repeatedly happens it's likely your immobilizer module is shit gone. Or, there may be other issues going on (which I don't think is likely), maybe you just need to not turn the IGNITION on, rather the ACCESSORY on.
Try checking the fuses, narrow the problem to either user error or component failure. The vehicle is an '08, the immobiliser is likely to be fucked by time. That would be a genuinely costly replacement without a dealership-specific tool.
Here is a video for reference, and this guy made a video for just adding a key as well;
https://youtu.be/-J-BoV6w7jg?si=rAy6R-zUxtH8gBmM