ABS fault code

[britishrocco]

Hi all my wife 2007 xc90 V8 throw me an ABS code last weekend, C003007 (Toothed wheel left front. General malfunction information. Mechanical malfunction (B6324S)) I've checked the toothed wheel and cleaned it, everything looks fine, wheel bearing, sensor. put the scanner on it and went on a test drive as you can see in the picture below, there's a glinch in the graph. also there is a difference in the speed. what can cause that? ever experience that??