1554678 | Genuine Generic® DEF Sensor Head 18"

Description: A DEF (Diesel Exhaust Fluid) Sensor Head Assembly 1554678 is a critical emissions control component in modern diesel engines equipped with Selective Catalytic Reduction (SCR) systems. It monitors and manages various aspects of the DEF tank and fluid, ensuring that the vehicle meets emissions regulations by properly injecting DEF into the exhaust stream. DEF Sensor Head 18", Digital, Deutsch DT4 (STD) Part Number: 1554678 Condition: New Manufacture/Brand: Generic Specifications For 1554678: Electrical Connector: Deutsch DT4 (STD) Sensor Type: Digital (canbus) DEF Header Height (IN): 18 Fits 1554678 For   Blue Bird, Capacity,Dynapac, E-One, Equipment Technologies, Kalmar Ottawa, Liugong Construction, Manitou, McNeilus, Newell Coach, Pierce, Rev Parts, Rosenbauer, Sany, Terex, TICO Tractors, Tiffin Motorhomes, Doosan Bobcat, Gillig, Battle Motors, Crane Carrier Company, Cummins, Grande West / Vicinity Motors Purpose of using 1554678: Function Purpose Level Sensor Detects how much DEF is in the tank Quality Sensor Measures DEF concentration (should be 32.5% urea / 67.5% deionized water) Temperature Sensor Monitors DEF temperature to prevent freezing or overheating Heater Warms DEF in cold weather so it can flow to the injector Filter Prevents debris from entering the DEF injection system Electronic Interface Communicates with the Engine Control Module (ECM) via CAN bus Signs of a Bad DEF Sensor Head 1554678: DEF level or quality fault codes "Incorrect DEF Quality" warning DEF tank shows full/empty incorrectly Engine derates or restricts speed Emissions system warnings