Cummins ISB CM850 (2003-06) Fault Code: 253 PID: 98 SPN: 98 FMI: 1 Engine Oil Level ? Data Valid But Below Normal Operational Range ? Most Severe Level. Very low oil level has been detected by the oil level sensor.
If inactive counts of Fault 253 are logged in the ECM, it could be possible that the engine was running or keyed on while tilted at an angle severe enough to cause this fault to be triggered.
1)The engine may not have been filled to proper capacity during the most recent oil change
2)External engine oil leaks (oil leaking onto the ground)
3)Internal engine oil leaks (oil leaking into the fuel system or cooling system)
4)High engine oil consumption/power cylinder failure (check for abnormally high blowby when the engine is loaded).
1)The ECM illuminates the appropriate amber or red fault lamp when the diagnostic runs and fails
2)The ECM turns off the appropriate fault lamp when the diagnostic runs and passes.
1)Replace the lubricating oil level sensor.
Cummins ISB CM850 (2003-06) Fault Code: 245 PID: SID 33 SPN: 647 FMI: 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 ISB CM850 (2003-06) Fault Code: 242 PID: 84 SPN: 84 FMI: 10 Vehicle Speed Sensor Circuit Tampering Has Been Detected – Abnormal Rate of Change. Invalid or inappropriate vehicle speed signal. Signal indicates an intermittent connection or VSS tampering.
Cummins ISB CM850 (2003-06) Fault Code: 241 PID: 84 SPN: 84 FMI: 2 Vehicle Speed Sensor Circuit – Data Erratic, Intermittent or Incorrect. The ECM lost the vehicle speed signal.
Cummins ISB CM850 (2003-06) Fault Code: 238 PID: SID 232 SPN: 611 FMI: 4 Sensor Supply 3 Circuit – Voltage Below Normal, or Shorted to Low Source. Low voltage detected on the +5 volt sensor supply circuit to the engine speed sensor.
Cummins ISB CM850 (2003-06) Fault Code: 237 PID: SID 30 SPN: 644 FMI: 2 External Speed Command Input (Multiple Unit Synchronization) – Data Erratic, Intermittent, or Incorrect. The throttle input signal to the primary or secondary engine for multiple unit synchronization is less than 3 percent or more than 97 percent.
Cummins ISB CM850 (2003-06) Fault Code: 235 PID: 111 SPN: 111 FMI: 1 Coolant Level – Data Valid but Below Normal Operational Range – Most Severe Level. Low engine coolant level detected.
