A key-not-detected message means the vehicle is not recognizing the key or fob as expected. The cause may involve the fob, its battery, or communication with the vehicle, so the message is not a complete diagnosis.
Confirm that the correct key is present and consult the manual for any designated backup starting position. If a spare key is available, note whether it behaves differently. Do not assume a running vehicle will restart after being switched off.
Share the circumstances with Cherry City Transmissions, including whether the issue occurs only in certain locations or with one particular key.