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.
- 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
A $30 car code reader can't do diesel. The HD7000 reads full-system codes and does parked DPF regen, idle/speed-limit, and service resets from the cab — on everything from a 6.7 Cummins/Power Stroke/Duramax pickup to Class-8 trucks (Detroit, Paccar, CAT, Volvo, Mack, International).
Check Price on AmazonAffiliate link -- we earn a commission at no extra cost to you.
Full-system 6/9/16-pin diesel scan tool for Cummins, Paccar, CAT, Detroit and more — plug-and-play, no subscription. A cheaper way to read heavy-duty codes a basic OBD2 scanner skips entirely.
Check Price on AmazonAffiliate link -- we earn a commission at no extra cost to you.
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
Step-by-Step Diagnostic Procedure
Blow out radiator and charge-air cooler from clean side with 80-100 psi.
Command fan to 100% via Service ADVISOR and verify pull.
Pressure-test cooling system -- combustion gas test if no external leak found.
On 9.0L PSS check EGR cooler for weeping.
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.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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: