Cummins ISB CM850 (2003-06) Fault Code: 2346 (ISB) PID: SPN: 2789 FMI: 15 Exhaust gas temperature – data above normal. High exhaust temperature has been calculated by the electronic control system.
The most common cause of this fault code is low boost. Low boost can be caused by several factors:
1)Leaking charge air cooler
2)Damaged charge air piping or hose
3)Loose charge air cooler clamps
4)Failed intake manifold pressure sensor
5)Failed variable geometry turbocharger.
NOTE: This fault code will most likely not become active under conditions of the engine being unloaded and in the shop. The engine must be loaded to trip this fault code and to verify if the failure has been fixed.
Possible repairs:
1)Replace the turbocharger.
Cummins ISB CM850 (2003-06) Fault Code: 2345 (ISC) PID: 103 SPN: 103 FMI: 10 Turbocharger Speed Invalid Rate of Change Detected – Abnormal Rate of Change. The turbocharger speed sensor has detected an erroneous speed value.
Cummins ISB CM850 (2003-06) Fault Code: 2345 (ISB) PID: 103 SPN: 103 FMI: 10 Turbocharger speed – invalid rate of change detected. The turbocharger speed sensor has detected an erroneous speed value.
Cummins ISB CM850 (2003-06) Fault Code: 2322 PID: SID 64 SPN: 723 FMI: 2 Backup Engine Speed/Position Sensor Number 2 – Data Erratic, Intermittent, or Incorrect. Camshaft engine speed sensor intermittent synchronization.
Cummins ISB CM850 (2003-06) Fault Code: 2321 PID: 190 SPN: 190 FMI: 2 Engine Crankshaft Speed/Position – Data Erratic, Intermittent, or Incorrect. Crankshaft engine speed sensor intermittent synchronization.
Cummins ISB CM850 (2003-06) Fault Code: 2311 PID: SID 81 SPN: 633 FMI: 11 Fueling Actuator Number 1 Circuit Error Conditions Exists. Fuel pump actuator circuit resistance too high or too low.
Cummins ISB CM850 (2003-06) Fault Code: 2293 PID: SPN: FMI: 18 Fuel inlet meter device flow demand lower than expected – data valid but below normal operational range – moderately severe level. The flow demand is lower than expected.
