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.

Posted by PerDiezel Solutions on January 18, 2026

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 restriction
2)Excessive air in fuel
3)Loss of fuel prime during cranking
4)Plugged fuel filter
5)Low lift pump pressure
6)Stuck or restricted electronic fuel control actuator
7)System return (excessive return flow from the injector, high-pressure pump, or rail pressure relief valve)
8)Tampering.

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.

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.

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.

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.

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.

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.

WARNING!