![]() Turn the ignition on and ensure that the DEF level gauge is reading correctly.Ħ8192659AC.Module kit, urea pump/level unitĦ8035704AB.Diesel exhaust fluid (1 gallon)Ħ8056278AB.Diesel exhaust fluid (2. Using wiTECH, perform a DEF Reductant Doser Pump Prime Override test a total of 10 times to ensure that the DEF pump has been sufficiently primed and that all air has been purged from the pump and filter. Ensure that the DEF tank is approximately one-half full. DTCs may be present, including P203B (reductant level sensor circuit performance), P203C (diesel exhaust fluid reductant level sensor circuit low) or P203D (diesel exhaust fluid reductant level sensor circuit high). The sensor translates this signal change into a fluid level and buses the information to the IPC (instrument panel cluster) via the DCU (dosing control unit).Ī manufacturing defect in the level sensor may have occurred if built on or after April 1, 2014, and on or before Sept. As the fluid level in the tank decreases, the level sensor becomes exposed to air which alters the signal sent out by the sensor. The DEF system uses a complex radio frequency type level sensor to detect the amount of fluid present in the DEF tank. A defect may be present with the DEF (diesel exhaust fluid) level sensor. ![]() These systems exist on most modern diesel pickups, diesel cars, semi-trucks and farm equipment. ![]() In the September 2014 issue of Diesel World we talked about diesel exhaust fluid (DEF), which is used as an exhaust treatment in modern diesel emissions systems to reduce the levels of nitrogen oxide (NOx) in the exhaust. ![]() This bulletin applies to 2014-2 trucks equipped with a 6.7L Cummins diesel engine. How to Repair A Diesel Exhaust Fluid (DEF) Contaminated Fuel System. ![]()
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