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Cummins ISL CM850 (2003-06) Fault Code: 554 PID: 157 SPN: 157 FMI: 2 Injector Metering Rail 1 Pressure - Data Erratic, Intermittent, or Incorrect. the ECM has detected that the fuel pressure signal is not changing.

Cummins ISL CM850 (2003-06) Fault Code: 559 (ISL) PID: 157 SPN: 157 FMI: 1 Fuel Pump Delivery Pressure Low - Data Valid but Below Normal Operational Range - Moderately Severe Level. The ECM has detected that fuel pressure is lower than commanded pressure.

Cummins ISL CM850 (2003-06) Fault Code: 559 (ISC) PID: 94 SPN: 94 FMI: 0 Injector Metering Rail 1 Pressure - Data Valid but Below Normal Operational Range - Moderately Severe Level. The ECM has detected that fuel pressure is lower than commanded pressure.

Cummins ISL CM850 (2003-06) Fault Code: 584 PID: SID 39 SPN: 677 FMI: 3 Starter Relay Circuit - Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at starter lockout circuit.

Cummins ISL CM850 (2003-06) Fault Code: 585 PID: SID 39 SPN: 677 FMI: 4 Starter Relay Circuit - Voltage Below Normal or Shorted to Low Source. Low voltage detected at starter lockout circuit.

Cummins ISL CM850 (2003-06) Fault Code: 595 (ISC) PID: 103 SPN: 103 FMI: 0 Turbocharger Number 1 Speed High - Data Valid but Above Normal Operational Range - Moderately Severe Level. High turbocharger speed has been detected.

Cummins ISL CM850 (2003-06) Fault Code: 595 (ISL) PID: 103 SPN: 103 FMI: 0 Turbocharger Number 1 speed high - warning level. High turbocharger speed has been detected.

Cummins ISL CM850 (2003-06) Fault Code: 596 PID: 167 SPN: 167 FMI: 0 Electrical Charging System Voltage High - Data Valid But Above Normal Operating Range - Moderately Severe Level. High battery voltage detected by the battery voltage monitor feature.

Cummins ISL CM850 (2003-06) Fault Code: 597 PID: 167 SPN: 167 FMI: 1 Electrical Charging System Voltage Low - Data Valid But Below Normal Operating Range - Moderately Severe Level. Low battery voltage detected by the battery voltage monitor feature.

Cummins ISL CM850 (2003-06) Fault Code: 598 PID: 167 SPN: 167 FMI: 11 Electrical Charging System Voltage Low - Data Valid But Below Normal Operating Range - Most Severe Level. Very low battery voltage detected by the battery voltage monitor feature.