SPN 651 FMI 6: injector cylinder 1, current high or grounded
Injector cylinder 1 circuit: current above normal or grounded circuit. Type another SPN and FMI to check it.
Injector cylinder 1 circuit: current above normal or grounded circuit. An electrical fault (usually a wire shorted to ground or a shorted coil), not a reading out of range.
- Look at the plug and harness at the injector cylinder 1 for rubbed, pinched, wet or green pins.
- Check supply voltage and ground at the plug (or the coil resistance on a valve or heater).
- If the wiring is good, replace the part.
Paste the whole line if you like: "SPN 3251 FMI 0", "3251/0" or Deere's "003251.00". Plain-words guidance; the service manual wins.
What SPN 651 FMI 6 means
Injector cylinder 1 circuit: current above normal or grounded circuit. An electrical fault (usually a wire shorted to ground or a shorted coil), not a reading out of range.
FMI 6: current high or grounded
Too much current. Usually a wire shorted to ground or a shorted coil. (SAE J1939-73: Current above normal or grounded circuit.)
How urgent it is
Fix it today. Fix it this shift or today. Left alone it tends to become a derate.
What to check first
- Look at the plug and harness at the injector cylinder 1 for rubbed, pinched, wet or green pins.
- Check supply voltage and ground at the plug (or the coil resistance on a valve or heater).
- If the wiring is good, replace the part.
Plain-words guidance for a foreman, not a repair procedure. Makers add their own codes and steps; the machine's service manual wins.
Other FMIs for SPN 651
| Code | What failed | Urgency |
|---|---|---|
| SPN 651 FMI 5 | current low or open circuit | Fix it today |
Next time, Dozer catches the code when it fires.
Plug a CAN logger into the machine's J1939 port, or connect the telematics you have. When a code fires, Dozer opens a repair ticket with the meaning, how urgent it is and what to check.
- The code, the machine and its hours on one ticket
- Severity sorted: keep working, plan a stop, or stop now
- The mechanic gets the checklist before they drive out
- Repeat codes on the same machine get flagged
LIVE EX-04 · SPN 3251 FMI 0 · plan a stop today Photo is an AI-generated stand-in, not a customer site.
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Questions crews ask
What does SPN 651 FMI 6 mean?
Injector cylinder 1 circuit: current above normal or grounded circuit. An electrical fault (usually a wire shorted to ground or a shorted coil), not a reading out of range. FMI 6 means: Too much current. Usually a wire shorted to ground or a shorted coil.
Can I keep running with SPN 651 FMI 6?
Fix it today. Finish what's safe to finish, then fix it this shift. Ignoring it usually turns into a derate or a bigger repair. If the machine derates or the stop lamp is on, stop.
What should I check first for SPN 651 FMI 6?
Look at the plug and harness at the injector cylinder 1 for rubbed, pinched, wet or green pins. Check supply voltage and ground at the plug (or the coil resistance on a valve or heater). If the wiring is good, replace the part.
How do I clear SPN 651 FMI 6?
Fix the cause first. Most codes go inactive by themselves once the condition is gone and the engine has run a key cycle or two. Clearing it with a service tool without a fix only hides it until it comes back.
Which machines show SPN 651 FMI 6?
Any diesel that speaks SAE J1939: excavators, dozers, loaders, haul trucks, generators and on-road trucks with Cat, Cummins, Deere, Komatsu, Volvo, Kubota, Perkins and other engines. The SPN means the same thing on all of them; the fix steps can differ, so check the service manual.
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