Cylinder #2 Injector - Current Below Normal (Open Circuit)
The JD-SPN652-FMI5 (John Deere PowerTech) diesel fault code means: Cylinder #2 Injector - Current Below Normal (Open Circuit). This is a serious severity code.
- Keep driving?
- Yes, with caution
- DIY difficulty
- intermediate
- Estimated cost
- $250-$650 injector, $60-$220 harness
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What Are the Symptoms of JD-SPN652-FMI5?
- Rough idle / misfire on cylinder 2
- Smoke on cold start
- Loss of power
What Causes JD-SPN652-FMI5? (Most Likely First)
- Broken solenoid wire in valve-cover pass-through Very Likely
- Failed injector solenoid Likely
- ECU driver fault Less Likely
Can I Still Drive with JD-SPN652-FMI5?
Yes, with caution. JD-SPN652-FMI5 is rated serious severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
Frequently Asked Questions
What is John Deere fault code SPN 652 FMI 5?
On John Deere PowerTech engines, SPN 652 FMI 5 means: Cylinder #2 Injector - Current Below Normal (Open Circuit). Serious code -- address promptly to avoid inducement / further damage.
Can I keep using my John Deere tractor with SPN 652 FMI 5?
Serious fault -- you can move the machine to a shop but don't run it under load. Diagnose with John Deere Service ADVISOR via an EDL v3 / CF3 interface.
How much does it cost to fix John Deere SPN 652 FMI 5?
Repair cost range: $250-$650 injector, $60-$220 harness. Dealer labor on large tractors runs $180-$240/hr in 2026.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose JD-SPN652-FMI5?
Swap-test injector with cyl 1.
Check harness continuity ECU->injector.
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- Perkins 854F-34T Engine Fault Code table, printed in the Genie ZX-135/70 Service Manual, Part No. 218700, September 2015printed page 240: SPN 652 FMI 5, "Engine Injector Cylinder #02 :Current Below Normal". The table is that engine maker's; it establishes what the J1939 SPN-FMI pair means, not that a John Deere display shows it.
- John Deere Operator's Manual, PowerTech 4.5 L and 6.8 L Tier 2 OEM Diesel Engines, OMRG33324 (Issue 16Feb04), reproduced as a supplement in Genie's telehandler parts library (doc 237949), "Listing of Diagnostic Trouble Codes"printed page 45-29: SPN 652 FMI 05, "Cylinder #2 EI Circuit Open". This is John Deere's own table for PowerTech 4.5 L and 6.8 L Tier 2 engines; later PowerTech engines were not checked against it.
Which Vehicles Commonly Get JD-SPN652-FMI5?
- 2014+ John Deere 6R Series tractors
- 2015+ John Deere 7R Series tractors
- 2015+ John Deere 8R / 8RT Series tractors
- 2015+ John Deere 9R / 9RT / 9RX Series tractors
- 2015+ John Deere S670 / S680 / S690 combines
- John Deere S770 / S780 / S790 combines
- John Deere 544/644/724 wheel loaders (construction)
- John Deere 310/410 backhoes
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