This Preliminary Information communication provides information to the technician about vehicles that have a ?Service Exhaust Fluid System? and a ?See Owner?s Manual Now? message displayed on the Instrument Panel Cluster. Technician may find reductant level sensor Diagnostic Trouble Codes P203D, P21AB, and P21B0 set. Technician will need to follow published Service Information diagnostics for the Diagnostic Trouble Codes that are set. If no wiring concerns are found replace the Diesel Exhaust Fluid tank assembly.
