Using key fob to open car ok. When locked by key fob alarm noise goes off few minutes later

2016 Citroen DS3 1.2
Car: Citroen DS3
Year: 2016
Variant: 1.2
Categories: Electrics, ECU, Warnings & Lights
When opening car with key fob ok. When locked with key fob sets alarm off few minutes later. Locked manually is OK. Why is this?
Problem added: Dec 9, 2023 (2 months ago)
Tried re-syncing / reprogramming the key?
Answered Dec 9, 2023 (2 months ago)
Thanks for your help, not sure how to reprogram the key?
Answered Dec 10, 2023 (2 months ago)
No idea on that car or why it should happen . Does car have interior sensor that can be disarmed ? check if bonnet alarm sensor as on some cars this can fail or water ingress

https://www.youtube.com/watch?v=RtsaYBfT7tE

https://obd365.wixsite.com/diyobd2/single-post/2016/11/23/how-to-program-citroen-ds3-remote-key-by-vvdi2
Answered Dec 10, 2023 (2 months ago)

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