Cummins ISC CM2150 (2007-09) Fault Code: 1664 PID: SPN: 3050 FMI: 11 Catalyst Missing – Condition Exists. The aftertreatment catalyst in the exhaust system is not present.

Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe® Online for applicable fixes to the calibration stored in the ECM. If necessary, recalibrate the ECM.

This fault code becomes active when the aftertreatment diesel oxidation catalyst inlet and aftertreatment diesel particulate filter inlet temperature sensors do not detect the presence of a catalyst in the aftertreatment system.

Possible causes:

1)Tampering with the catalyst system
2)Removing the catalyst system from the vehicle
3)A damaged catalyst.

Possible repairs:

1)Install the proper diesel oxidation catalyst for the application.