Hi, my 2013 Octavia 3 TDi has a center pedestrian crash sensor fault showing as an airbag issue on the dash. Code B1 0E904 on my Autel diagnostic unit. All of the 3 bumper mounted sensors check out ok with a resistance of about 733 ohms, the bumper wiring all rings out as ok. what else could this be?

That error is usually associated with the front level sensor - https://www.briskoda.net/forums/topic/408744-afs-fault-lights-no-longer-adjusting/