JD-SPN185-FMI14 serious John Deere PowerTech ›

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.

My Garage →
Keep driving?
Yes, with caution
DIY difficulty
intermediate
Estimated cost
$0-$180 software / operator-guide update

What Are the Symptoms of JD-SPN185-FMI14?

  • Informational code -- no power loss
  • Data-logging / telematics warning on JDLink

What Causes JD-SPN185-FMI14? (Most Likely First)

  • Stale or missing configuration parameter Likely
  • Historical over-range event already resolved Likely
  • GPS / CAN broadcast mismatch Possible

Can I Still Drive with JD-SPN185-FMI14?

Yes, with caution. JD-SPN185-FMI14 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 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.

Mechanics Guide Step-by-step diagnosis

How Do You Diagnose JD-SPN185-FMI14?

  1. Verify current configuration vs. dealer PIP update.

  2. Clear the code; if it does not return after 10 engine hours, consider resolved.

Sources 1

This page is built from documented references. Verify against your own service info before repair work.

  • SAE J1939-73Application Layer: Diagnostics (defines the SPN/FMI fault-identifier framework)

Which Vehicles Commonly Get JD-SPN185-FMI14?

  • 2015+ John Deere 7R Series (7210R, 7250R, 7290R, 7310R)
  • 2015+ John Deere 8R / 8RT Series (8245R-8370R)
  • 2015+ John Deere 9R / 9RT / 9RX Series (9370R-9620R)
  • John Deere S670 / S680 / S690 combines
  • John Deere S770 / S780 / S790 combines

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More John Deere PowerTech codes → Diesel home All diesel codes Heavy-duty Guides

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