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Yes you need to connect it to the computer via OBD Port
Even if you continue to try a Regeneration, it won't work as the fault is now on your cars computer and will need to be cleared before it will allow it to actually try again.
It's not difficult if you get all the correct bits and pieces, or most garages will be able to clear them for a small charge... But I got mines from www.bmtechnic.co.uk very easy to install, good price, and the guys there offer good support of you need a hand
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