Yup, the doors can only be manually locked because when ignition is turned on, the FOB is disabled. This is for safety reasons and to prevent accidental arming of the security system.
Locking the doors with the engine running is not a good practice and should be avoided because if someone breaks the glass, he can drive the vehicle away and your insurance most probably would not be paying you.
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Tuesday, October 31st, 2017 AT 2:04 AM