John Deere Engines SPN1076FMI13 Fault Code: Pump Current Decay Time Invalid
Pump Current Decay Time Invalid · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
SPN 1076 FMI 13 means the ECU detected high resistance in the Stanadyne DE10 injection pump's fuel control solenoid circuit. The engine will immediately derate to 50% of full power and the red stop lamp will come on.
High severity. The ECU cuts engine power to 50% of full power the moment this code sets, and the red stop lamp comes on. That is an immediate, forced power loss, not just a warning light, so it should be diagnosed as soon as possible even though the engine will still run and can usually be driven to a safe stop or shop.
What does John Deere Engines error code SPN1076FMI13 mean?
SPN 1076 FMI 13 applies to engines using the Stanadyne DE10 injection pump. This pump has an internal fuel control solenoid that the ECU switches on and off to control a pump control valve. When current to the solenoid increases, the valve moves into a position that allows injection pressure to build. When current decreases, the valve returns to a position that ends injection pressure. By managing this current, the ECU controls both the quantity and timing of fuel delivered to the engine.
FMI 13 specifically points to an 'out of calibration' type failure, in this case the ECU has detected high resistance in the pump solenoid circuit itself, meaning the solenoid is not responding to current commands the way it should.
Because this solenoid is central to how fuel is metered and timed, the ECU treats a bad reading here as serious enough to immediately protect the engine by cutting power rather than letting fueling continue unmonitored.
What triggers a John Deere Engines SPN1076FMI13 code?
DTC 1076.13 sets when the ECU detects high resistance in the pump solenoid.
Common causes of SPN1076FMI13
- Bad terminals or connector at the ECU
- Bad terminals or connectors at the pump
- Open or short in the circuits to the pump solenoid
- Bad pump
- Bad ECU
How to troubleshoot John Deere Engines SPN1076FMI13: first checks
- Inspect the ECU connector and terminals for corrosion, looseness, bent pins, or moisture intrusion.
- Inspect the connector and terminals at the injection pump for the same issues, corrosion, looseness, or damage.
- Check the wiring harness between the ECU and the pump solenoid for opens or shorts, looking closely at chafe points, connectors, and any repairs or splices.
- If wiring and connectors check out, suspect the pump solenoid itself as the source of the high resistance reading.
- If the pump and wiring both test good, consider the ECU as the possible cause, but rule out simpler causes first since ECU failures are less common.
How the code clears
No separate clearing step is listed. Once the underlying cause, whether bad terminals, a wiring fault, a bad pump, or a bad ECU, is found and repaired, the code should clear on its own after the ECU no longer detects the high resistance condition. A key cycle or short run time to confirm the fault does not return is good practice.
Frequently asked questions
What does SPN 1076 FMI 13 mean on a John Deere engine?
It means the ECU detected high resistance in the fuel control solenoid inside the Stanadyne DE10 injection pump. This solenoid controls fuel quantity and timing, so the ECU responds by derating engine power to 50% and turning on the red stop lamp.
Can I keep driving or operating with this code active?
The engine will keep running but only at 50% of full power, and the red stop lamp will be on. It is best treated as a get-it-checked-soon situation rather than something to ignore, since ongoing operation with a bad solenoid circuit is not doing the fuel system any favors.
Why did my engine suddenly lose power with the red lamp on?
That combination, sudden power loss to about half power plus the red stop lamp, is exactly what John Deere lists as the expected behavior when DTC 1076.13 sets, so it is consistent with this code rather than a random issue.
What usually causes this fault?
John Deere lists five possible causes: bad terminals or connector at the ECU, bad terminals or connectors at the pump, an open or short in the circuits to the pump solenoid, a bad pump, or a bad ECU. Connector and wiring issues are the more common and easier starting points to check.
Is the injection pump itself always bad when this code sets?
Not necessarily. The pump is one of five listed possible causes, but connector corrosion, loose terminals, or a wiring fault between the ECU and pump can cause the same high resistance reading without the pump itself being defective.
Does the code clear itself after repair?
No separate clearing step is listed. Once the actual cause is repaired, the fault condition should stop being detected and the code and derate should clear, typically confirmed with a key cycle or short test run.