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Cummins ISM CM875 (2003-06) Fault Code: 254 PID: S017 SPN: 632 FMI: 4/4 Fuel Shutoff Valve Circuit – Shorted Low. Low voltage detected at fuel shutoff valve circuit.

Inspect the fuel shutoff supply circuit for external wires that can be spliced in to power another device. Remove any extra wires that are found in the circuit. If there is an external shutdown system on the vehicle that uses the fuel shutoff valve for engine shutdown, make sure it has not failed and pulled down the voltage on the fuel shutoff circuit. Inspect the engine-to-chassis ground wire to make sure it is securely fastened to a clean, dry, conductive surface.

Possible causes:

1)Short circuit to ground in the engine harness, connectors, or fuel shutoff valve.

Possible repairs:

1)Replace the fuel shutoff valve.2)Replace the fuel shutoff valve solenoid.3)Replace the ECM.4)Repair or replace the engine harness.

Cummins ISM CM875 (2003-06) Fault Code: 249 PID: P171 SPN: 171 FMI: 3/3 Ambient Air Temperature Sensor 1 Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at ambient air temperature circuit.
Cummins ISM CM875 (2003-06) Fault Code: 245 PID: S033 SPN: 647 FMI: 4/4 Fan Control Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the fan control circuit when commanded ON.
Cummins ISM CM875 (2003-06) Fault Code: 242 PID: P084 SPN: 84 FMI: 10/10 Wheel-Based Vehicle Speed Sensor Circuit Tampering Has Been Detected – Abnormal Rate of Change. Signal indicates an intermittent connection or vehicle speed sensor (VSS) tampering.
Cummins ISM CM875 (2003-06) Fault Code: 241 PID: P084 SPN: 84 FMI: 2/2 Wheel-Based Vehicle Speed – Data Erratic, Intermittent, or Incorrect. The ECM lost the vehicle speed signal or is reading an erratic value.
Cummins ISM CM875 (2003-06) Fault Code: 234 PID: P190 SPN: 190 FMI: 0/0 Engine Crankshaft Speed/Position – Data Valid But Above Normal Operating Range – Most Severe Level. Engine speed signal indicates engine speed above engine protection limit.
Cummins ISM CM875 (2003-06) Fault Code: 227 PID: S232 SPN: 620 FMI: 3/3 Sensor Supply 2 Circuit – Voltage Above Normal or Shorted to High Source. High voltage detected at sensor supply number 2 circuit.