Have a different issue my self, but as you have been investigating obd live data, you might be able to tell me whether you are obtaining speed reading pid data.
I have a log file that I believe may be beneficial as a comparison. But as I have a different issue I thought best worn you.
And...
Hav
Have same issue,. Have rest ECU and it stays off when I drive the car, but if mum is driving it comes on (on one section of road usually trigger it otherwise it's random.)
Having found a small snippet of information that the code could be emitions related though it best to try and capture...