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Fuel Pressure Low – Data Valid But Below Normal Operational Range – Moderately Severe Level.
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Overview
| CODE | REASON | EFFECT |
| Fault Code: 482 PID: P094 SPN: 94 FMI: 1/18 LAMP: Amber SRT: |
Fuel Pressure Low – Data Valid But Below Normal Operational Range – Moderately Severe Level. |
Engine may not start, white smoke, run rough, or lose power. |
 Fuel System Circuit
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Circuit Description
The gear pump draws fuel from the fuel tank through a suction fuel filter and an anti-drainback valve. The gear pump develops between 1724 and 2620 kPa [250 and 380 psi] of fuel pressure. The fuel flows through a pressure fuel filter and fuel shutoff valve to the fueling and timing actuators and rail fuel pressure sensor.
Component Location
Use the following procedure for a detailed component location view. Refer to Procedure 100-002 in Section E.
Shop Talk
The fuel pressure is monitored by the ECM. If the rail fuel pressure is lower than an acceptable level for a given set of engine operating conditions, the fault code is logged.
NOTE: One possible cause of this fault code is a damaged or sticking drain-back valve located in the fuel supply circuit in the integrated fuel system module (IFSM). The IFSM is located directly above the fuel lift pump.
Refer to Troubleshooting Fault Code t05-482.
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