Case IH 3106 (DTC 1145) - ECU – ECU A-095: Fuel pressure relief valve reached maximum allowed opening count

The mechanical Pressure Relief Valve (PRV) is integrated into the high-pressure fuel rail and opens if excessive rail pressure occurs. The Engine Control Unit (ECU) senses the sudden reductions in rail pressure and keeps a running count. If this count exceeds 50 openings, the ECU triggers this fault code.

• MAXXUM T4E
• Case IH 240 Series Axial-Flow Combines
• Case IH Puma series tractors
• Case IH Magnum series tractors (MX210, MX230, MX255, MX285)

1. 1

   Check the system for any other active fault codes (especially fuel system or pressure-related faults) and diagnose them first, as they may be the root cause of the overpressure condition.

1. 1

   Replace the Pressure Relief Valve

   Replace the Pressure Relief Valve (PRV) on the fuel rail.

2. 2

   Connect the Electronic Service Tool

   Connect the Case IH Electronic Service Tool (EST) to the machine.

3. 3

   Perform a PRV counter reset

   Use the EST to perform a PRV counter reset (this clears the ECU's internal count of valve openings).

4. 4

   Verify operation

   Return the machine to service and verify operation.

5. 5

   Check and re-flash ECU software

   If the fault remains active after replacing the valve and resetting the counter, check ECU A-095 for the appropriate software version and re-flash the ECU if necessary.