Engine Coolant Temperature Sensor - Voltage Above Normal
The JD-SPN110-FMI3 (John Deere PowerTech) diesel fault code means: Engine Coolant Temperature Sensor - Voltage Above Normal. This is a moderate severity code.
- Keep driving?
- Yes, with caution
- DIY difficulty
- beginner
- Estimated cost
- $90-$200 sensor, $40-$150 harness repair
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What Are the Symptoms of JD-SPN110-FMI3?
- Dash reads max temp and fan stays on
- Cold-start derate (ECU thinks it's already hot)
What Causes JD-SPN110-FMI3? (Most Likely First)
- Open coolant temp sensor or broken pigtail Very Likely
- ECU connector pin push-out Possible
Can I Still Drive with JD-SPN110-FMI3?
Yes, with caution. JD-SPN110-FMI3 is rated moderate 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 110 FMI 3?
On John Deere PowerTech engines, SPN 110 FMI 3 means: Engine Coolant Temperature Sensor - Voltage Above Normal. Moderate code. Keep working cautiously and plan repair.
Can I keep using my John Deere tractor with SPN 110 FMI 3?
Moderate fault -- continue light use, fix at next service. Diagnose with John Deere Service ADVISOR via an EDL v3 / CF3 interface.
How much does it cost to fix John Deere SPN 110 FMI 3?
Repair cost range: $90-$200 sensor, $40-$150 harness repair. Dealer labor on large tractors runs $180-$240/hr in 2026.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose JD-SPN110-FMI3?
Ohm sensor across pins -- compare to Deere CTM table (should be a few K-ohms at 25 C).
Back-probe ECU for 5V reference at sensor connector.
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- John Deere Operator's Manual, PowerTech 4.5 L and 6.8 L Tier 2 OEM Diesel Engines, OMRG33324 (Issue 16Feb04), reproduced as a supplement in Genie's telehandler parts library (doc 237949), "Listing of Diagnostic Trouble Codes"printed page 45-24: SPN 110 FMI 03, "Engine Coolant Temperature Input Voltage High". This is John Deere's own table for PowerTech 4.5 L and 6.8 L Tier 2 engines; later PowerTech engines were not checked against it.
- Perkins 854F-34T Engine Fault Code table, printed in the Genie S-100/S-105/S-120/S-125 Service Manual, Part No. 102916, January 2016printed page 5-29: SPN 110 FMI 3, "Engine Coolant Temperature: Voltage Above Normal". The table is that engine maker's; it establishes what the J1939 SPN-FMI pair means, not that a John Deere display shows it.
SPN110-FMI3 on Other Platforms
The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown:
Which Vehicles Commonly Get JD-SPN110-FMI3?
- 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
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