Diesel Exhaust Fluid Level Warning Lamp

WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

Courtesy of FORD MOTOR COMPANY

A warning lamp will illuminate and a message will appear in the information display when the DEF level is low and needs to be refilled.

NOTE: If the warning lamp illuminates when the vehicle is driving and the DEF fluid level is at a sufficient level, this indicates a system malfunction.

NOTE: Once the DEF (AdBlue®) low warning messages occur, it is recommended to refill the vehicle with a minimum of 10.57 qt (10 L) of DEF (AdBlue®) to clear the warning system.