What does error code B2020 means? 2018 RT.

Yesterday while riding, I noticed an exclamation mark ( ! ) illuminated on the dash. I pulled offer to investigate and before I even came to a full stop, the indicator went off.

I first checked the manual and the explanation given was "Vehicle Malfunction", real helpful.

I thought of the error code, checked and found "B2020" displayed.

I knew I had a list of codes on my phone but B2020 was not on there, probably an out of date list.

The SpyderCode app also does not appear to know about that code.

Since the light had gone off, I decided to keep riding and at the lunch stop ( about twenty minutes later ), the code was no longer being shown.

So, does anybody knows what B2020 means?

Is there a more up to date list of codes available somewhere?

Thanks