were did you find that pic???? it wasn't in the manual I downloaded??? Anyways... Code 14 & 16 are for the front speed sensor... 24 & 27 are for the rear speed sensor. I'm assuming if you are having a mechanic look at it, you don't know how to pull the codes. If you downloaded the manual from here: http://vehicross.info/modules.php?na...warticle&id=20), go to page 350... there is a description on how to pull the codes even without the scanner. If you are getting up there in miles, you may just wanna pull both and see if there is just a little "fuzz" on them like mine... TOD service may be a good idea if there is, I'll be doing mine this weekend.