2005 Ford escape,4WD V6 codes U0121, U2023, u1900 ,p1825, u0415

Question

Service 4 wd light comes on as soon as I start to roll.Scan check reveals codes U0121,U2023,u1900,p1825,u0415.Took back in to rescan about a week later as per instructed by the mechanic ,but now it shows no codes but my service 4wd light is still on.Any ideas I might be able to look at.Any help would be appreciated.Thanks

Answer 1

U0121 Lost communication with ABS system

U2023 External Node fault DTC- ABS module

U1900 CAN communication Bus fault (4WD control module)

U0415 Invalid data received from ABS

To gather the code on this particular vehicle a scan tool that can check the GEM module is needed with also the ABS system.  One code that stands out is P1825 for this code check the fuse listed as SJB which is fuse 18 and replace if open this would cause the 4WD light to stay on.