DTC P249C - SCR Time To Closed Loop

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P249C - SCR TIME TO CLOSED LOOP

Description:	This DTC sets when the amount of time to enter closed loop control of the selective catalytic reduction (SCR) system is greater than a calibrated threshold.
Possible Causes:	Damaged exhaust gas temperature bank 1, sensor 2 (EGT12) sensor Damaged exhaust gas temperature bank 1, sensor 3 (EGT13) sensor Damaged exhaust gas temperature bank 1, sensor 4 (EGT14) sensor Damaged SCR system components Biased nitrogen oxides bank 1, sensor 2 (NOx12) sensor
Diagnostic Aids:
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	GO to PINPOINT TEST RC .