Intake Manifold / Boost Pressure Sensor - Voltage Above Normal
The JD-SPN102-FMI3 (John Deere PowerTech) diesel fault code means: Intake Manifold / Boost Pressure Sensor - Voltage Above Normal. This is a moderate severity code.
- Keep driving?
- Yes, with caution
- DIY difficulty
- beginner
- Estimated cost
- $120-$260 sensor, $80-$300 harness repair
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What Are the Symptoms of JD-SPN102-FMI3?
- Reduced power / derate at high PTO load
- Black smoke at rated load
- MAP sensor fault active on dash
What Causes JD-SPN102-FMI3? (Most Likely First)
- MAP/boost sensor harness open or shorted to power Very Likely
- Failed boost pressure sensor Likely
- Corrosion in connector from pressure-wash intrusion Likely
Can I Still Drive with JD-SPN102-FMI3?
Yes, with caution. JD-SPN102-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 102 FMI 3?
On John Deere PowerTech engines, SPN 102 FMI 3 means: Intake Manifold / Boost Pressure Sensor - Voltage Above Normal. Moderate code. Keep working cautiously and plan repair.
Can I keep using my John Deere tractor with SPN 102 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 102 FMI 3?
Repair cost range: $120-$260 sensor, $80-$300 harness repair. Dealer labor on large tractors runs $180-$240/hr in 2026.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose JD-SPN102-FMI3?
Ohm the sensor signal line back to the ECU -- should read < 5 ohms.
Check for 5V reference at sensor connector with key on.
Swap with known-good sensor from parts tractor to confirm.
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- Deutz TCD 2.2 L3 Engine Fault Codes table, printed in the Genie SX-135 XC Service and Repair Manual, Part No. 1263383GT, April 2023printed page 159: SPN 102 FMI 3 (DTC 1115), "Intake manifold pressure sensor voltage above normal or shorted to high". The table is that engine maker's; it establishes what the J1939 SPN-FMI pair means, not that a John Deere display shows it.
Which Vehicles Commonly Get JD-SPN102-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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