Cummins ISB CM850 (2003-06) Fault Code: 2216 (ISC) PID: 94 SPN: 94 FMI: 1 Fuel Pump Delivery Pressure High – Data Valid but Above Normal Operational Range – Moderately Severe Level. The ECM has detected that fuel pressure is higher than commanded pressure. A fuel pump actuator with excessive leakage or a damaged inboard o-ring will result in high fuel rail pressures at idle or light load. If the fuel pump actuator exhibits excessive leakage, it is possible that the fuel rail pressure will reach the opening pressure of the fuel rail pressure relief valve and Fault Code 449 may...

Cummins ISB CM850 (2003-06) Fault Code: 2217 PID: SID 240 SPN: 630 FMI: 111 Engine Control Module Calibration Program Memory (RAM) Corruption – Condition Exists. Severe loss of data from the ECM. On-Board Diagnostics (OBD) Information (Euro 4 Certified Engines): 1)The ECM illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.2)The ECM turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail. The MIL lamp and fault code can also be cleared using the INSITE? service tool.3)The fault code will be cleared from memory after 40 consecutive...

Cummins ISB CM850 (2003-06) Fault Code: 222 PID: 108 SPN: 108 FMI: 4 Barometric Pressure Sensor Circuit – Voltage Below Normal, or Shorted to Low Source. Low 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 222, check for multiple faults. Possible causes: 1)Signal circuit open or shorted to ground in the engine harness or sensor2)Supply line open or shorted to ground. On-Board Diagnostics (OBD) Information (Euro...

Cummins ISB CM850 (2003-06) Fault Code: 2249 PID: 157 SPN: 157 FMI: 1 Injector Metering Rail 1 Pressure – Data Valid but Below Normal Operational Range – Most Severe Level. The ECM has detected that fuel pressure is lower than commanded pressure. Fault Code 2249 is very similar to Fault Code 559 except that the fault triggers at a different fuel pressure threshold limit. If Fault Code 2249 is active, the troubleshooting procedures for Fault Code 559 must be followed. Possible repairs: 1)High inlet restriction2)Excessive air in fuel3)Loss of fuel prime during cranking4)Plugged fuel filter5)Low lift pump pressure6)Stuck or restricted...

Cummins ISB CM850 (2003-06) Fault Code: 2265 PID: SID 126 SPN: 1075 FMI: 3 Electric Lift Pump for Engine Fuel Supply Circuit – Voltage Above Normal, or Shorted to High Source. High voltage or open detected at the fuel lift pump signal circuit. On 12 VDC Automotive and 24 VDC Industrial or Marine systems, this fault code becomes active if the ECM detects an open circuit at keyswitch ON. The cause of this fault code is an open circuit in the electric fuel lift pump circuit. If the fault code is intermittent, look for causes of an intermittent open circuit,...