JD-SPN110-FMI0 critical John Deere PowerTech ›

Engine Coolant Temperature - Data Valid but Above Normal (Most Severe)

The JD-SPN110-FMI0 (John Deere PowerTech) diesel fault code means: Engine Coolant Temperature - Data Valid but Above Normal (Most Severe). This is a critical severity code.

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Keep driving?
No — stop driving
DIY difficulty
intermediate
Estimated cost
$0-$150 cleanout, $180-$900 thermostat/fan clutch, $1,800-$3,500 EGR cooler, $6K+ head work
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Common Symptoms

  • Red STOP lamp, forced shutdown
  • Rapid cooling fan engagement
  • Coolant loss, steam from hood

Probable Causes (Ranked by Likelihood)

  • Plugged radiator screens (common on combines and windrowers) Very Likely
  • Stuck thermostat / failed viscous fan clutch Likely
  • Coolant leak at EGR cooler (known weak point on PowerTech 9.0L) Likely
  • Failed water pump or cracked head gasket Possible

Frequently Asked Questions

What is John Deere fault code SPN 110 FMI 0?

On John Deere PowerTech engines, SPN 110 FMI 0 means: Engine Coolant Temperature - Data Valid but Above Normal (Most Severe). Critical code -- stop operating until repaired.

Can I keep using my John Deere tractor with SPN 110 FMI 0?

Critical fault -- do not operate; tow or trailer to a dealer. Diagnose with John Deere Service ADVISOR via an EDL v3 / CF3 interface.

How much does it cost to fix John Deere SPN 110 FMI 0?

Repair cost range: $0-$150 cleanout, $180-$900 thermostat/fan clutch, $1,800-$3,500 EGR cooler, $6K+ head work. Dealer labor on large tractors runs $180-$240/hr in 2026.

Mechanics Guide Step-by-step diagnosis

Step-by-Step Diagnostic Procedure

  1. Blow out radiator and charge-air cooler from clean side with 80-100 psi.

  2. Command fan to 100% via Service ADVISOR and verify pull.

  3. Pressure-test cooling system -- combustion gas test if no external leak found.

  4. On 9.0L PSS check EGR cooler for weeping.

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)

SPN110-FMI0 on Other Platforms

The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown:

CAT critical Engine Coolant Temperature Above Normal

Commonly Affected Vehicles

  • 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

Explore More

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

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