To me it means no fault, however you obviously have a fault somewhere.
Can be faulty speed sensors (check with nanocom, or do speedo check by lifting axles off the ground and turning each wheel, one at a time).
Or a problem with the ABS modulator shuttle valve switches (see http://www.aulro.com/afvb/good-oil/3...3-amigoes.html in the good oil forum. Option B is a common fix).
Or possibly earth fault.
From what I've read, this fault frightens the shirt off people, but it seems to be a relatively simple and cheap fix, 95% of the time.
Anyway, if in doubt visit "The Good Oil".
2002 D2 4.6L V8 Auto SLS+2" ACE CDL Truetrac(F) Nanocom(V8 only)
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