Average Fuel Economy (mpg or L/hr) - Special Instructions
The JD-SPN185-FMI14 (John Deere PowerTech) diesel fault code means: Average Fuel Economy (mpg or L/hr) - Special Instructions. This is a serious severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- intermediate
- Estimated cost
- $0-$180 software / operator-guide update
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Common Symptoms
- Informational code -- no power loss
- Data-logging / telematics warning on JDLink
Probable Causes (Ranked by Likelihood)
- Stale or missing configuration parameter Likely
- Historical over-range event already resolved Likely
- GPS / CAN broadcast mismatch Possible
Step-by-Step Diagnostic Procedure
Verify current configuration vs. dealer PIP update.
Clear the code; if it does not return after 10 engine hours, consider resolved.
Frequently Asked Questions
What is John Deere fault code SPN 185 FMI 14?
On John Deere PowerTech engines, SPN 185 FMI 14 means: Average Fuel Economy (mpg or L/hr) - Special Instructions. Serious code -- address promptly to avoid inducement / further damage.
Can I keep using my John Deere tractor with SPN 185 FMI 14?
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 185 FMI 14?
Repair cost range: $0-$180 software / operator-guide update. 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.