First of all, don't despair
And Yes, You'd need a really smart scan tool to read the proper code
But, before You
p: .... do the following: if space is too tight for you, lift the rear axle a bit,
then, just above the diff, there is a connector which, 90% of the times, is the culprit!
Remove it CAREFULLY, connectors don't come cheap, clean it with contact spray,reinstall and
cross fingers....
I've heard cases where oxidation formed on the ABS unit side, but some contact cleaner did the trick!
Connectors (2 IIRC) are a in an uncomfortable position however....so, leave that as the last resort...
Unfortunately, front wheels' sensors are a PITA to access, You'll need to almost remove the hub..
They're about 40 U$ each and RH/LH are different, as usual....