John Deere Engines SPN3513FMI3 Fault Code: Sensor Supply #5 Voltage Out of Range High
Also called Engine Shutdown Commanded by Application
Sensor Supply #5 Voltage Out of Range High · ai-assisted, editor-reviewed · Last updated 2026-07-13
TL;DR
SPN 3513 FMI 3 sets when the ECU detects the Sensor Supply #5 circuit above 5.26 volts, a supply used by optional devices like the secondary analog throttle, remote throttle, AC high-pressure switch, or isochronous/droop governor switch. It is logged as a Warning-level code with the ignition on while the fault is active, and it may also appear under the description 'Engine Shutdown Commanded by Application' depending on the application configuration.
Medium severity. This is logged at Warning alarm level, not an immediate shutdown-critical fault. The ECU keeps trying to maintain proper operating conditions, but any device sharing this 5-volt supply can send bad signals to the ECU until the overvoltage condition is fixed, so it should be diagnosed promptly rather than ignored.
What does John Deere Engines error code SPN3513FMI3 mean?
SPN 3513 FMI 3 means the John Deere engine ECU has detected that its internal Sensor Supply #5 circuit, a regulated 5-volt reference used to power certain optional sensors and switches, is reading above 5.26 volts. This supply line is not the sensor signal itself, it is the reference voltage those sensors depend on to produce an accurate signal, so if the supply is too high every device on that circuit can report skewed or incorrect readings to the ECU.
Depending on the specific machine and configuration, devices that draw from Sensor Supply #5 can include the secondary analog throttle, remote throttle, AC high-pressure switch, and the isochronous/droop governor switch, all listed as optional equipment. Not every machine will have all of these installed, and other application-specific devices may also share this circuit, so checking the technical manual for the exact machine is important.
When this fault is active, the ECU's control unit response is simply to try to maintain proper operating conditions. It does not force an automatic derate or shutdown by itself according to the available diagnostic information, though the alternate description tied to this code, 'Engine Shutdown Commanded by Application', suggests that in some machine configurations the application logic layered on top of the ECU could act on this condition.
What triggers a John Deere Engines SPN3513FMI3 code?
The DTC is displayed when the ignition is on and the fault condition is active, specifically when the ECU detects a Sensor Supply #5 voltage greater than 5.26 volts. No additional time delay, rpm threshold, or duty-cycle condition is listed for setting this code.
Common causes of SPN3513FMI3
- Bad terminals or connector at the secondary analog throttle, remote throttle, AC high-pressure switch, or isochronous/droop governor switch (whichever are installed on the machine)
- A short in the wiring harness, including a short to a voltage source or an intermittent short to voltage in the harness
- Bad or outdated ECU software
- Bad terminals or connector at the ECU itself, or a bad ECU connector connection
- A bad ECU
- A bad or shorted secondary analog throttle or remote throttle component
How to troubleshoot John Deere Engines SPN3513FMI3: first checks
- With the ignition on, check for the active fault and note whether any related devices (throttle, AC high-pressure switch, governor switch) are behaving erratically
- Inspect connectors and terminals at the ECU and at each device that uses Sensor Supply #5 for corrosion, looseness, bent pins, or moisture intrusion
- Trace the harness for that sensor supply circuit looking for chafed insulation, pinched wiring, or a short to a voltage source
- Check the resistance and condition of the secondary analog throttle, remote throttle, AC high-pressure switch, or governor switch for internal shorting
- Confirm the ECU software level is current, since outdated or bad ECU software is a listed possible cause
How the code clears
No separate clearing step is listed. Once the underlying overvoltage condition on the Sensor Supply #5 circuit is corrected, the fault should stop being active; verify by cycling the ignition and confirming the code is no longer displayed as active.
Frequently asked questions
What does SPN 3513 FMI 3 mean on a John Deere engine?
It means the engine ECU detected the Sensor Supply #5 voltage circuit reading above 5.26 volts, which is out of specification for that regulated 5-volt supply used by certain optional sensors and switches.
Is SPN 3513 FMI 3 a serious fault?
It is logged at Warning alarm level. The ECU tries to maintain proper operating conditions rather than forcing an immediate shutdown, but devices sharing that supply circuit can send inaccurate signals until it is fixed, so it should not be left unaddressed.
What components can trigger this code?
Devices that use Sensor Supply #5 include the secondary analog throttle, remote throttle, AC high-pressure switch, and isochronous/droop governor switch, all optional depending on the machine's configuration. Other application-specific devices may also be involved, so check the machine's technical manual.
Can a wiring short cause SPN 3513 FMI 3?
Yes, a short in the harness, including an intermittent short to a voltage source, is one of the listed possible causes, along with bad connectors at the ECU or at the affected device.
Does SPN 3513 FMI 3 always mean the ECU is bad?
Not necessarily. A bad ECU is one possible cause, but bad or outdated ECU software, harness shorts, and connector problems at either the ECU or the affected sensor/switch are also listed causes that should be ruled out first.
Why does this code sometimes show as 'Engine Shutdown Commanded by Application'?
That is an alternate description tied to the same SPN 3513 FMI 3 code, suggesting that in some machine setups the application software layered above the ECU can act on this fault, though the base ECU response is only to try to maintain proper operating conditions.