Fg Xr6 Fault Codes

[n/axr6ute]

Hey guys, I have had 20" wheels on my car for about 2 months, and I recently changed all 4 back to my standard 18" wheels. after doing so it has been coming up with all sorts of fault codes that include, abs fault, dsc fault, air bag fault, system comms fault, and 1 other that isnt coming to mind at this time.

Does anyone have any info about what could be happening? is the computer sh*tting itself? I thought id post on here to see if anyone else has had this problem. it happens 98% of the time im driving and happens about 30 seconds after I start moving.

Any help would be greatly appreciated.

Thanks, Sam.

[bionicxr6t05]

Rolling diamter has changed, take it to ford so the abs module can be calibrated to suit the rims on it

[n/axr6ute]

yeah but its not just the abs fault going, its weird, ill see what they say about it though, thanks for the info

[bionicxr6t05]

Rcm needs a valid wheel speed signal to pre arm airbags and system comms fault will be a U code caused by invalid data recieved from abs module... My best guess without seeing it myself

[n/axr6ute]

ah okay.. would a simple fix be to just put my 20's back on? and I spose this will happen every time I change the wheel size.. or is there a way around it in the tune?

thanks, sam.