What to Do When the Car Key Doesn't Work After Just Replacing the Battery?

[ColtonLynn]

Smart keys can emit infrared signals, which can unlock one or two doors, the trunk, and the fuel filler cap, as well as operate the car's windows and sunroof. If the car key stops working after replacing the battery, the following situations may occur: 1. Coding failure. The solution is to insert the key into the ignition and turn it repeatedly, being careful not to start the car. After repeating this four or five times, press and hold any button on the key to recode and reactivate it. 2. There may be a leakage fault in the circuit board inside the remote control, or a button may not have popped back up. The engine will only start when the central processor detects that the key is inside the car.