John Deere Fault Code
Free · no signupSPN 5246 FMI 16
Derate (5 MPH Limit)
System
Aftertreatment
Symptom
Derate (5 MPH Limit)
Diagnosis & fix steps
LOGIC: SCR Operator Inducement.
ACTION: Check dosing valve for urea crystals.
Red Seal field insights
Specs: Limits speed to 5 mph.
PRO-TIP: Check DEF quality sensor for "water" readings.
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