Cylinder #4 Injector - Current Below Normal (Open Circuit)
The JD-SPN654-FMI5 (John Deere PowerTech) diesel fault code means: Cylinder #4 Injector - Current Below Normal (Open Circuit). This is a serious severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- intermediate
- Estimated cost
- $250-$650 injector
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Common Symptoms
- Misfire on cyl 4
- White smoke at idle
Probable Causes (Ranked by Likelihood)
- Harness break at valve cover pass-through Very Likely
- Failed injector Likely
Step-by-Step Diagnostic Procedure
Injector swap-test, wiring resistance check.
Frequently Asked Questions
What is John Deere fault code SPN 654 FMI 5?
On John Deere PowerTech engines, SPN 654 FMI 5 means: Cylinder #4 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 654 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 654 FMI 5?
Repair cost range: $250-$650 injector. Dealer labor on large tractors runs $180-$240/hr in 2026.
Sources
This page is built from documented references. Verify against your own service info before repair work.