EGR Valve Position - Data Valid but Above Normal Operational Range (Most Severe)
The JD-SPN2791-FMI0 (John Deere PowerTech) diesel fault code means: EGR Valve Position - Data Valid but Above Normal Operational Range (Most Severe). This is a critical severity code.
- Keep driving?
- No -- stop driving
- DIY difficulty
- intermediate
- Estimated cost
- $180-$650 EGR valve or cooler cleaning, $900-$2,400 cooler R&R -- add dealer diagnostic time ($180-$240/hr in 2026)
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Common Symptoms
- Lack of throttle response
- Black smoke under load
- EGR-related derate on aftertreatment models
Probable Causes (Ranked by Likelihood)
- Carbon packed on EGR valve seat Very Likely
- EGR cooler internal leak (coolant in intake) Possible
- EGR position sensor out of calibration Likely
- EGR actuator stepper motor failure Possible
Step-by-Step Diagnostic Procedure
Service ADVISOR EGR sweep test -- confirm actual vs. desired vane/valve position.
Pressure-test EGR cooler for coolant leak if coolant loss is unexplained.
Inspect intake for excessive carbon build-up; scrape if >3/8 inch.
Check for exhaust back-pressure out of spec causing EGR hang-up.
Frequently Asked Questions
What is John Deere fault code SPN 2791 FMI 0?
On John Deere PowerTech engines, SPN 2791 FMI 0 means: EGR Valve Position - Data Valid but Above Normal Operational Range (Most Severe). Critical code -- stop operating until repaired.
Can I keep using my John Deere tractor with SPN 2791 FMI 0?
Critical fault -- do not operate; tow or trailer to a dealer. Diagnose with John Deere Service ADVISOR via an EDL v3 / CF3 interface.
How much does it cost to fix John Deere SPN 2791 FMI 0?
Repair cost range: $180-$650 EGR valve or cooler cleaning, $900-$2,400 cooler R&R -- add dealer diagnostic time ($180-$240/hr in 2026). Dealer labor on large tractors runs $180-$240/hr in 2026.
Sources
This page is built from documented references. Verify against your own service info before repair work.