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Cummins ISB CM850 (2003-06) Fault Code: 1633 PID: SPN: 625 FMI: 2 Komnet Datalink Cannot Transmit - Data Erratic, Intermittent, or Incorrect. Communications within the OEM datalink network is intermittent.

Cummins ISB CM850 (2003-06) Fault Code: 1639 PID: SID 51 SPN: 703 FMI: 11 Auxiliary Equipment Sensor Input Number 3 (OEM Switch) - Root Cause Not Known.

Cummins ISB CM850 (2003-06) Fault Code: 1654 PID: SPN: 1323 FMI: 11 Engine Misfire Cylinder 1- Condition Exists. Engine misfire has been detected in cylinder number 1.

Cummins ISB CM850 (2003-06) Fault Code: 1655 PID: SPN: 1324 FMI: 11 Engine Misfire Cylinder 2 - Condition Exists. Engine misfire has been detected in cylinder number 2.

Cummins ISB CM850 (2003-06) Fault Code: 1656 PID: SPN: 1325 FMI: 11 Engine Misfire Cylinder 3 - Condition Exists. Engine misfire has been detected in cylinder number 3.

Cummins ISB CM850 (2003-06) Fault Code: 1657 PID: SPN: 1326 FMI: 11 Engine Misfire Cylinder 4 - Condition Exists. Engine misfire has been detected in cylinder number 4.

Cummins ISB CM850 (2003-06) Fault Code: 1658 PID: SPN: 1327 FMI: 11 Engine Misfire Cylinder 5 - Condition Exists. Engine misfire has been detected in cylinder number 5.

Cummins ISB CM850 (2003-06) Fault Code: 1659 PID: SPN: 1328 FMI: 11 Engine Misfire Cylinder 6 - Condition Exists. Engine misfire has been detected in cylinder number 6.

Cummins ISB CM850 (2003-06) Fault Code: 1663 PID: SPN: 3241 FMI: 11 Catalyst Inlet Temperature Sensor Swapped with Outlet ? Condition Exists. The inlet and outlet catalyst temperature sensor connections are swapped.

Cummins ISB CM850 (2003-06) Fault Code: 1664 PID: SPN: 3050 FMI: 11 Catalyst Missing ? Condition Exists. The aftertreatment catalyst in the exhaust system is not present.