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: 595 (ISL) PID: 103 SPN: 103 FMI: 0 Turbocharger Number 1 speed high – warning level. High turbocharger speed has been detected.

This fault code becomes inactive at key-on or any time the ECM detects a valid turbocharger speed signal. One cause of this fault code is high-frequency electrical noise. If the fault occurs intermittently, check the circuit and the sensor pigtail connector for opens or short circuits.

Possible repairs:

1)Repair or replace the engine harness.
2)Replace the turbocharger speed sensor.