Cummins ISB6.7 CM2350 (2013-17) Fault Code: 6245 PID: SPN: 4094 FMI: 11 NOx Limits Exceeded Due to Insufficient Reagent Quality – Condition Exists. The diesel exhaust fluid quality is not sufficient enough to provide adequate NOx reduction.
Cummins ISB6.7 CM2350 (2013-17) Fault Code: 6245 PID: SPN: 4094 FMI: 11 NOx Limits Exceeded Due to Insufficient Reagent Quality – Condition Exists. The diesel exhaust fluid quality is not sufficient enough to provide adequate NOx reduction.
Circuit Description
The engine control module (ECM) monitors the NOx concentration in the engine’s exhaust gases using an aftertreatment intake NOx sensor and an aftertreatment outlet NOx sensor. By comparing these two values, the ECM is able to determine the conversion efficiency of the SCR catalyst and dosing system.
Component Location
The SCR catalyst is located in the vehicle’s exhaust system, after the diesel particulate filter and decomposition tube.
Conditions for Running the Diagnostics
This diagnostic has to meet specific engine and aftertreatment conditions to run and complete.
Conditions for Setting the Fault Codes
The Engine Control Module (ECM) detected the NOx conversion across the SCR catalyst was less than expected.
Action Taken When the Fault Code is Active
1)The ECM illuminates the amber CHECK ENGINE lamp and/or the Malfunction Indicator Lamp (MIL) immediately when the diagnostic runs and fails.
2)Engine torque will be reduced if the engine is operated for an extended period of time with this fault active.
Conditions for Clearing the Fault Code
To validate the repair:
1)Use INSITE? electronic service tool to perform the Aftertreatment SCR Performance Test found in the ECM Diagnostic Tests Section.
2)The ECM will turn off the amber CHECK ENGINE lamp immediately after the diagnostic runs and passes.
3)The fault code status displayed by INSITE? electronic service tool will change to INACTIVE immediately after the diagnostic runs and passes.
4)For On-Board Diagnostics (OBD) engines, the ECM will extinguish the Malfunction Indicator Lamp (MIL) after three consecutive trips where the diagnostic runs and passes.
5)The Reset All Faults command in INSITE? electronic service tool can be used to clear active and inactive faults, as well as extinguish the MIL for OBD applications.
Shop Talk
Troubleshoot all other active NOx sensor and SCR dosing system related fault codes before this fault.
Possible causes:
1)Malfunctioning diesel exhaust fluid dosing system
2)Exhaust system leaks
3)Malfunctioning SCR catalyst
4)Degraded, diluted, or incorrect diesel exhaust fluid
5)Diesel exhaust fluid deposits in the decomposition tube
