Diesel Exhaust Fluid (DEF) Level Sensor Manufacturing Defect
This bulletin involves replacing the DEF pump module.
A manufacturing defect in the level sensor may have occurred, if the level sensor was
built within the time frame listed above. There may be a Malfunction Indicator Lamp (MIL)
illuminated. Upon further investigation a technician may find one or more of the following
Diagnostic Trouble Codes (DTCs).
? P203B - Reductant Level Sensor Circuit Performance.
? P203C - (Diesel Exhaust Fluid) Reductant Level Sensor Circuit Low.
? P203D - (Diesel Exhaust Fluid) Reductant Level Sensor Circuit High.
