John Deere Engines SPN1347FMI5 Fault Code: Suction Control Valve Circuit Has High Resistance
Also called Engine Shutdown Commanded by Application, Fuel Pressure Control Valve #1 Circuit Has High Resistance, Pump Control Valve #1 Error, Pump Control Valve Current Mismatch
Suction Control Valve Circuit Has High Resistance · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
SPN 1347 FMI 5 means the ECU can't match the measured current on the fuel pump control valve (also called the pressure control valve or suction control valve) with what it's commanding, or it sees high circuit resistance/an open in that valve's circuit. The engine may run rough, lose power under load, or in some cases not start at all. Treat it as a fuel system electrical fault that needs prompt diagnosis.
High severity. This code triggers an engine derate and can cause low power under load or a no-start condition depending on which valve and failure mode is involved. If both pressure control valves (DTCs 001347.05 and 001348.05) are disabled at the same time, this becomes a stop condition. Diagnose promptly rather than continuing to run the machine hard.
What does John Deere Engines error code SPN1347FMI5 mean?
SPN 1347 FMI 5 relates to the pump control valve (also referred to as the fuel pressure control valve or suction control valve #1) on the high pressure fuel pump. This valve regulates how much fuel the supply pump sends into the high pressure common rail (HPCR). The solenoid has constant power supplied to it, and the ECU controls it by grounding the circuit for a calculated time: longer ground time means more fuel delivered, shorter time means less fuel delivered, matching what the electronic injectors need.
FMI 5 specifically points to a circuit problem, either the ECU detecting an open in the circuit, or the ECU seeing higher-than-expected resistance in the circuit, or the ECU being unable to match the measured pump current against the commanded current. Depending on which underlying description applies, the effect ranges from one side of the injection pump no longer supplying fuel, to the ECU losing the ability to control the suction control valve entirely.
If only one side of the pump loses fuel supply, the engine may still idle fine but will show low power at high idle or under load. If the suction control valve is stuck wide open due to a short or open circuit, maximum pressure can build in the rail and trip the pressure relief valve, which often prevents the engine from starting at all.
What triggers a John Deere Engines SPN1347FMI5 code?
The ECU sets this code under a few different circuit conditions depending on the specific valve and fault type: an open detected in the Pump Control Valve #1 circuit, a reported current value lower than an internally specified value on the fuel pressure control valve #1 circuit (indicating high resistance), or the ECU being unable to match measured pump current to commanded pump current on the suction control valve. It can be displayed with the ignition ON while the ECU is actively controlling the valve, during a Harness Diagnostic Mode Test with the fault active, during engine cranking or running, or at key ON during ECU startup with the error condition active.
Common causes of SPN1347FMI5
- Bad terminals or connector at the Pump Control Valve #1 / Fuel Pressure Control Valve #1 / suction control valve connector
- Bad terminals or connector at the ECU, including connector Y5022A on some configurations
- Open or short in the wiring harness between the ECU and the valve
- A bad Pump Control Valve #1, Fuel Pressure Control Valve Solenoid #1, or suction control valve
- A bad ECU
- Outdated ECU software (listed specifically for the suction control valve variant of this fault)
How to troubleshoot John Deere Engines SPN1347FMI5: first checks
- Without disconnecting anything first, visually inspect the ECU connectors and the PCV #1 connector for contamination, corrosion, damage, or a connector that isn't fully seated.
- Inspect the wiring harness between the ECU and the valve for chafing, pinches, or damage that could cause a short or an open circuit.
- Check connector Y5022A (where equipped) along with the standard PCV #1 and ECU connectors for loose or corroded terminals.
- Follow the listed troubleshooting sequence: this code is often diagnosed after first checking SPN 613 FMI 3 and SPN 613 FMI 4, or after SPN 1347 FMI 3, so confirm those codes are cleared or addressed first.
- If wiring and connectors check out, test the valve itself and confirm ECU software is current, since outdated ECU software is a listed possible cause for the suction control valve version of this fault.
- Watch engine behavior: fine idle but weak performance under load or at high idle points toward one side of the pump losing fuel supply, while a no-start condition points toward the suction control valve being stuck open and the rail hitting its pressure relief valve.
How the code clears
No separate clearing step is listed beyond correcting the underlying wiring, connector, valve, or ECU problem. Once the circuit fault is repaired, the code should stop being active; there is no distinct reset procedure described for this DTC.
Frequently asked questions
What does John Deere SPN 1347 FMI 5 mean?
It means the ECU has detected a circuit problem with the fuel pump control valve (also called the pressure control valve or suction control valve #1) on the high pressure fuel pump. Depending on the specific fault, this could be an open circuit, higher-than-expected resistance, or the ECU being unable to match measured current with commanded current.
Can I keep driving or running the machine with this code active?
You can often keep running at low idle, but expect a commanded engine derate and possible low power at high idle or under load. If both pressure control valves are disabled at once, that is treated as a stop condition, so get it diagnosed rather than pushing through.
Why won't my engine start with this code?
If the suction control valve is stuck wide open due to a short or open in its circuit, the pump can push maximum pressure into the rail, tripping the pressure relief valve and preventing a start.
What other codes are related to SPN 1347 FMI 5?
The listed troubleshooting sequence includes checking SPN 613 FMI 3 and SPN 613 FMI 4 first, or SPN 1347 FMI 3 depending on the variant. SPN 1347 FMI 7 (Fuel Rail Pressure Incorrect) may also set as a result of this fault. If DTCs 001347.05 and 001348.05 are both active, that combination is treated as a stop condition.
What should a mechanic check first for this code?
Start with a visual inspection of the ECU and PCV #1 connectors and the wiring harness for contamination, damage, or poor seating, without disconnecting anything initially. Then check terminals at any related connector such as Y5022A, and confirm ECU software is up to date.
Is this an electrical fault or a fuel system fault?
It's really both: the underlying problem is in the wiring or connectors controlling a fuel system valve, so it shows up as an electrical circuit fault but directly affects fuel delivery and rail pressure control.