That message on the dash is a general warning, and, unfortunately, doesn't get as specific as you'd need it to be for you to try troubleshooting it yourself. Seen a lot of Cummins SCRs need replacement within the warranty period.Įither way, you're going to need to get hooked up to Insite and have DTCs checked. I don't remember what it is ver batim), you're replacing an SCR.
#2016 cummins ram service def system code
If you get a code of "SCR Mechanical Calibration Out of Adjustment" (or something like that. that DTC can be caused by a faulty nox sensor (and there should be such a code corresponding to it) or poor air intake. For the SCR, it could be catalyst conversion efficiency. It could be a problem with the DEF doser, the DEF sending unit, the DEF heater line, etc. Too much fuel or a restricted airflow (due to blockage in the air intake or a clogged air filter) and cracking in the DPF (on Cummins trucks which use the 90 degree outlets, cracking at the base of the neck is a common problem).
If it's not getting to temperature during regens, that could be for a number of reasons. That'll cause problems which will trigger a DTC.Ĭould be a problem with the aftertreatment differential pressure sensor, which might be a broken wire, a plugged tube, or a bad 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. There could be cracking in the DOC face or the DPF honeycomb. This bulletin applies to 2014-2 trucks equipped with a 6.7L Cummins diesel engine.
often, the dosing injector will either leak, dispense too much fuel, or the aftertreatment fuel shutoff valve will # up.
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