Lincoln Aviator ABS Light Due to Bad Ground
Some 2020 Lincoln Aviator vehicles built on or before Nov. 30, 2019, may exhibit an illuminated ABS warning indicator lamp with DTC C0020 stored in the ABS module.
It may not be necessary to replace the ABS module/hydraulic control unit (HCU) to resolve the DTC.
The problem may be due to a poor ground connection and/or improper plating on the attachment bolts at G108.
To correct the condition, replace and properly tighten the ground cable fasteners, P/N A505255. Tighten the new fasteners securing the ground cables to 106 in.-lbs.
Apply Motorcraft electrical grease XG-12 (or equivalent) to the fastener and ground cable eyelet. Clear any DTCs.
Ground cable bolt locations. Do not strip paint to achieve ground. Ground will be obtained via the bolt threads.
About the Author
Information courtesy of Mitchell 1
Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.
Mike MavrigianMike Mavrigian
Motor Age Editor
Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.
