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Fuel Filter Differential Pressure – Data Valid but Above Normal Operational Range – Moderately Severe Level
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Overview
| CODE | REASON | EFFECT |
| Fault Code: 2372 PID: P095 SPN: 95 FMI: 0/16 LAMP: Amber SRT: |
Fuel Filter Differential Pressure – Data Valid but Above Normal Operational Range – Moderately Severe Level. Fuel filter is plugged or fuel inlet restriction is high. |
The engine can respond poorly after motoring and/or the engine can have low power at high engine speeds. |
 ISX – Integrated Fuel System Module
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Circuit Description
This fault code activates if low fuel pressure is detected by the electronic control module (ECM) during high engine rpm or motoring conditions.
Component Location
There are two fuel filters and several original equipment manufacturer (OEM) supplied components that can impact this fault code. The pressure-side fuel filter is located on the integrated fuel system module. The suction-side fuel filters and other OEM supplied components are OEM specific. The OEM is required to supply a suction-side filter with 25 to 150 micron filtration. The suction-side filter is typically frame-mounted near the integrated fuel system module. However, exact location is OEM dependent. Refer to the OEM service manual.
Conditions for Running the Diagnostics
This diagnostic runs continuously when the engine is running.
Conditions for Setting the Fault Codes
Fuel pressure is less than a calibratible value during high fuel flow conditions, indicating a fuel inlet restriction.
Action Taken When the Fault Code is Active
- The ECM illuminates the amber CHECK ENGINE light immediately when the diagnostic runs and fails.
Conditions for Clearing the Fault Code
Idle the engine for 10 seconds. The ECM will turn off the amber CHECK ENGINE light immediately after the diagnostic runs and passes.
Shop Talk
Verify the electronic 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. See the corresponding Troubleshooting and Repair Manual for the engine being serviced.Refer to Procedure 019-032 in Section 19.
Low fuel pressure during high engine speeds or motoring conditions indicates a fuel inlet restriction or a plugged pressure-side fuel filter. Items that can cause this fault code to activate are:
- A plugged pressure or suction side fuel filter
- Collapsed fuel inlet lines
- An obstructed suction tube in the fuel tank
- Sticking or worn fuel shutoff valve disc, plunger, or return spring.
Refer to Troubleshooting Fault Code t05-2372
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