Ford DEF Stuck in Full

Some 2017-2018 Ford F-Super Duty trucks equipped with a 6.7L engine may exhibit a concern where the DEF level indicator appears to be stuck in the full position.

Some 2017-2018 Ford F-Super Duty trucks equipped with a 6.7L engine may exhibit a concern where the DEF level indicator appears to be stuck in the full position. If this is encountered, reprogram the PCM using the latest calibration level.

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 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.

Sign up for our eNewsletters
Get the latest news and updates

Voice Your Opinion!

To join the conversation, and become an exclusive member of Vehicle Service Pros, create an account today!