Open windows and Frunk. Disconnect battery. Leave Frunk open. Get immobilizer out. Clean contacts on cable harness with alcohol or contact cleaner.
Open immobilizer cover and inspect for corrosion. Clean corrosion (wire brush). Spay EVERYTHING with contact cleaner. Place on cookie pan and place in the oven at 150-175 for 20 minutes. Remove from oven and let cool.
No guarantees but doesn’t cost anything to try. Good luck!
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