PowerTech - Engine Derate Due to Aftertreatment Inducement
Can I Drive?
No -- Stop Driving
DIY Difficulty
advanced
Estimated Cost
Depends on root cause
What does JD-SPN523350-FMI31 mean?
The JD-SPN523350-FMI31 (John Deere PowerTech) diesel fault code means: PowerTech - Engine Derate Due to Aftertreatment Inducement. This is a serious severity code.
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
Step-by-Step Diagnostic Procedure
Service ADVISOR: resolve the primary aftertreatment fault FIRST, then use dealer-level parameter reset to clear inducement.
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.