Intake Manifold Pressure High - Overboost
The JD-SPN102-FMI16 (John Deere PowerTech) diesel fault code means: Intake Manifold Pressure High - Overboost. This is a serious severity code.
- Keep driving?
- Yes, with caution
- DIY difficulty
- advanced
- Estimated cost
- $900-$1,800 VGT actuator, $2,400-$4,500 turbo assembly
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Common Symptoms
- Power derate at WOT
- Turbo whistle or surge
- Possible intercooler boot popping off
Probable Causes (Ranked by Likelihood)
- Stuck variable-geometry turbo (VGT) vanes carboned open Very Likely
- Failed VGT actuator / stepper motor Likely
- Leaking or miscommanded wastegate (on PVS fixed-geometry) Possible
- Exhaust back-pressure sensor drift Less Likely
Frequently Asked Questions
What is John Deere fault code SPN 102 FMI 16?
On John Deere PowerTech engines, SPN 102 FMI 16 means: Intake Manifold Pressure High - Overboost. Serious code -- address promptly to avoid inducement / further damage.
Can I keep using my John Deere tractor with SPN 102 FMI 16?
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 102 FMI 16?
Repair cost range: $900-$1,800 VGT actuator, $2,400-$4,500 turbo assembly. Dealer labor on large tractors runs $180-$240/hr in 2026.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
Command VGT sweep with Service ADVISOR -- vanes should move 0-100% smoothly.
Inspect turbo for soot lock; on Tier 4 Final 6.8L/9.0L PSS this is a known issue under light duty-cycle tractor work.
Road-test / PTO dyno at rated RPM and log actual vs. commanded boost.
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)
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
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