Cummins ISB CM850 (2003-06) Fault Code: 2195 PID: SID 51 SPN: 703 FMI: 14 Auxiliary Equipment Sensor Input Engine Protection Critical – Special Instructions. OEM switch signal on the OEM harness indicates engine protection condition. Verify the engine control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe? Online for applicable fixes to the calibration stored in the ECM. If necessary, calibrate the ECM. Verify with the driver the engine operating condition when the fault occurs. Depending on the engine speed and load, the OEM switch can detect a condition that falls below or exceeds the...

Cummins ISB CM850 (2003-06) Fault Code: 221 PID: 108 SPN: 108 FMI: 3 Barometric Pressure Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at barometric pressure circuit. The barometric pressure sensor shares supply and return wires in the engine harness with other sensors. Opens and shorts in the engine harness can cause multiple fault codes to be active. Before troubleshooting Fault Code 221, check for multiple faults. Possible causes: 1)Open return circuit in the harness, connectors, or sensor2)Signal circuit shorted to sensor supply or battery voltage. Operation below sea level: Note: If you...

Cummins ISB CM850 (2003-06) Fault Code: 2215 (ISB) PID: 94 SPN: 94 FMI: 1 Fuel Pump Delivery Pressure – Data Valid but Below Normal Operational Range – Moderately Severe Level. The ECM has detected the fuel pressure in the fuel rail is lower than the commanded performance. General Information: Fault Code 2215 logs when measured rail fuel pressure remains at least 10 MPa [1450 psi] less than commanded rail fuel pressure. Once detected, Fault Code 2215 will remain active until the engine is turned off or until the measured rail fuel pressure matches the commanded rail fuel pressure. When a...

Cummins ISB CM850 (2003-06) Fault Code: 2215 (ISC) PID: 94 SPN: 94 FMI: 0 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. If the engine will not start and Fault Code 559/2215 becomes active during cranking, but no speed sensor fault codes exist, monitor the fuel rail pressure with INSITE? electronic service tool. If the rail pressure is low, check the following: 1)Fuel system prime (make sure there is fuel in the tanks and the system is primed)2)Fuel lift...

Cummins ISB CM850 (2003-06) Fault Code: 2216 (ISB) PID: 94 SPN: 94 FMI: 0 Fuel pump delivery pressure – data valid but above normal operational range – moderately severe level. The ECM has detected fuel pressure in the fuel rail that is higher than the commanded pressure. An electronic fuel control actuator with excessive leakage will result in high rail fuel pressures at idle or light load, and Fault Code 2216 will be logged. A restriction in the fuel-drain-to-tank return line can prevent excess fuel from exiting the high-pressure fuel pump. This excess drain fuel can enter the pumping chamber...