Cummins ISX CM870 (2003-06) Fault Code: 2215 PID: P094 SPN: 94 FMI: 1/18 Fuel Pump Delivery Pressure – Data Valid But Below Normal Operating Range – Moderately Severe Level. Low fuel pressure has been detected by the ECM.
Verify the electronic control module (ECM) calibration is correct.
It is possible to swap the connections between the aftertreatment fuel pressure sensor and the fuel delivery pressure sensor. If this occurs, Fault Code 2215 will intermittently go active and the engine will run rough and will surge at low idle. If these symptoms are present, make sure the fuel pressure connections are connected properly.
The fuel pressure is monitored by the electronic control module (ECM). If the rail fuel pressure is lower than an acceptable level for given engine operating conditions, the fault code is logged.
Possible causes:
1)A damaged or sticking drain-back valve located in the fuel supply circuit in the integrated fuel system module (IFSM) which is located directly above the fuel lift pump.
Possible repairs:
1)Properly connect the aftertreatment fuel pressure sensor and fuel delivery pressure sensor wiring harness connections.
2)Prime the fuel system.
3)Fill the fuel tanks.
4)Repair or replace the fuel lift pump.
5)Repair or replace the fuel shutoff valve.
6)Replace the 1724 kPa [250 psi] regulator.
7)Use the following procedure in the Signature?, ISX, and QSX15 Service Manual, Bulletin 3666239 for repair or replacement of the fuel pump (gear pump).
8)Locate and repair the source of the air leak by checking all the OEM supply lines and fittings, suction-side fuel filter head, fuel tank stand pipes, ECM cooling plate, and ECM cooling plate fuel supply and return lines.
9)Replace the suction-side fuel filter or repair the cause of high inlet restriction.
10)Replace the pressure fuel filter.
11)Replace the regulator.
12)For ISX CM871 and ISM CM876 engines, use the following procedure for replacement of the rail fuel pressure sensor.
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