PowerTech - Engine Derate Due to Aftertreatment Inducement
The JD-SPN523350-FMI31 (John Deere PowerTech) diesel fault code means: PowerTech - Engine Derate Due to Aftertreatment Inducement. This is a serious severity code.
- Keep driving?
- No — stop driving
- DIY difficulty
- advanced
- Estimated cost
- Depends on root cause
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Common Symptoms
- Engine limited to low RPM / low-idle lockout
- DEF lamp solid red
Probable Causes (Ranked by Likelihood)
- Unresolved SCR / DEF fault active (see stored codes) Very Likely
- Tampered emissions system Possible
Frequently Asked Questions
What is John Deere fault code SPN 523350 FMI 31?
On John Deere PowerTech engines, SPN 523350 FMI 31 means: PowerTech - Engine Derate Due to Aftertreatment Inducement. Serious code -- address promptly to avoid inducement / further damage.
Can I keep using my John Deere tractor with SPN 523350 FMI 31?
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 523350 FMI 31?
Repair cost range: Depends on root cause. Dealer labor on large tractors runs $180-$240/hr in 2026.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
Service ADVISOR: resolve the primary aftertreatment fault FIRST, then use dealer-level parameter reset to clear inducement.
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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