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.
Unverified. We could not confirm this code's definition against freely available manufacturer documentation, so treat the meaning, severity and fix guidance on this page as unconfirmed. Check it against the manufacturer's service information for your exact model and serial range before acting on it. This page is kept out of search engines for that reason, and we are working through this family manual by manual.
- Keep driving?
- No — stop driving
- DIY difficulty
- advanced
- Estimated cost
- Depends on root cause
What Are the Symptoms of JD-SPN523350-FMI31?
- Engine limited to low RPM / low-idle lockout
- DEF lamp solid red
What Causes JD-SPN523350-FMI31? (Most Likely First)
- Unresolved SCR / DEF fault active (see stored codes) Very Likely
- Tampered emissions system Possible
Can I Still Drive with JD-SPN523350-FMI31?
No — stop driving. JD-SPN523350-FMI31 is rated serious severity. Continuing to drive in this state risks further damage — get it looked at before your next trip.
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
How Do You Diagnose JD-SPN523350-FMI31?
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)
Which Vehicles Commonly Get JD-SPN523350-FMI31?
- 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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