I’m impressed the D2 had such tech back then
I only have a plug in OBD2 reader that connects to my phone and it only shows the basic codes such as the omission of cats which triggers an EML every few hundred miles (I rarely bother clearing them anymore), however I vaguely remember my friend telling me before I had my cats removed that an engine mount was flagging up in his scanner but it wasn’t leaking...so he left it
I wonder if this was that. That was about 3 years ago at least.
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2002 S8 - Irish Green Pearl. Cat N (saved by the D2 Doctor

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1988 E30 Coupe - Royalblau Metallic
2003 S4 Avant - Light Silver Mettalic
2016 S5 Coupe Black Edition - Glacier White