2019 CX-3 (15,000mi) driver side door t-boned maybe 10 mph while running but sitting. Repair shop had it for 5 months due to parts and manpower. Alaska climate around 10F. Finally sent to dealer because of lockdown/battery died.

After all was done I had key warning light constantly blinking, occasional beeping but FOB is OEM w/new battery and all works fine, green light on start button and panel. I asked dealer about it and he said just let it go, these cars have this problem. Now after a week I get warning lights for high beam control and LED. This is usually after driving a few minutes and will go out for the remainder if I shut down and start again. I can turn off both light systems (not recommended) in control panel but it does not affect the lights. Tried the lock/unlock trick. Wondering if car battery could be the problem or FOB needs reprogramming. P.S. Dealer also said they charged the battery but after I had oil changed the shop said the battery terminals were corroded. Anyway, would appreciate any suggestions I can give the repair shop to refer to the dealer for extra warrantee work.

 

As nobody replied here I will tell myself the outcome in an effort to possibly help those who have phantom warning lights to include the infamous red key light.

The dealership looked the car over twice and finally found that the start stop unit was at fault. Total costs to insurance $1134.00. Part was $469 and Labor $665 @$180 per hour. Had to install and do software. Fixed all problems.