I also kept failing my reading at 21 percent. What worked for me was to start from a cold start and idle for 5-10 minutes and as SOON AS the "measure oil level" was selectable, I measured oil. It works for me, I dunno why, but if I drive anywhere longer than 10 minutes it doesn't allow me to...
Hey Everyone :)
I just moved from Illinois to LA (Culver city area) and wanted to reach out to the community to maybe meet new people, go to autocross events, track days, car meets etc.
DM me/Hit me up on IG! @Jadens_A90