Cummins ISB CM850 (2003-06) Fault Code: 2554 PID: 95 SPN: 1209 FMI: 2 Exhaust pressure sensor circuit – data erratic, intermittent, or incorrect. An error in the exhaust pressure sensor signal was detected by the ECM.
At key-on, before the engine is started, the readings for intake manifold pressure, barometric pressure, and exhaust pressure are compared. This fault code occurs if the exhaust pressure sensor reading is different from the other two. This check is only done once after the keyswitch is turned on. This fault will not occur while the engine is running.
Possible repairs:
1)Replace the exhaust pressure sensor.
Cummins ISB CM850 (2003-06) Fault Code: 2448 PID: SPN: 111 FMI: 17 Coolant Level – Data Valid But Below Normal Operational Range – Least Severe Level. Low engine coolant level detected.
Cummins ISB CM850 (2003-06) Fault Code: 2388 PID: SID 269 SPN: 2795 FMI: 13 Variable Geometry Turbocharger actuator position failed automatic calibration procedure – out of calibration.
Cummins ISB CM850 (2003-06) Fault Code: 2387 PID: SID 146 SPN: 2975 FMI: 7 Turbocharger actuator motor – the mechanical system is not responding properly or is out of adjustment. Turbocharger actuator is not responding or is slow to respond.
Cummins ISB CM850 (2003-06) Fault Code: 2386 PID: SPN: 2975 FMI: 6 Turbocharger actuator motor circuit – current is above normal. Excessive current detected at the turbocharger actuator motor circuit.
Cummins ISB CM850 (2003-06) Fault Code: 2385 (ISC) PID: SID 27 SPN: 641 FMI: 3 VGT Actuator – Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at turbocharger control valve circuit.
Cummins ISB CM850 (2003-06) Fault Code: 2385 (ISB) PID: SID 27 SPN: 641 FMI: 3 VGT actuator driver circuit – voltage above normal or shorted to high source.
