ECU Calibration Memory Fault - Received Network Data in Error
The JD-SPN631-FMI19 (John Deere PowerTech) diesel fault code means: ECU Calibration Memory Fault - Received Network Data in Error. 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?
- Yes, with caution
- DIY difficulty
- advanced
- Estimated cost
- $600-$2,400 ECU reflash or replacement
What Are the Symptoms of JD-SPN631-FMI19?
- ECU faults stored with no drivable symptom, or failure to wake ECU
- Service package mismatch (Gold / Silver / Bronze)
- SERVICE SOON or CHECK ENGINE on DisplayPort
What Causes JD-SPN631-FMI19? (Most Likely First)
- Incorrect software calibration installed after service package swap Likely
- Corrupt EEPROM after power cycle during programming Possible
- CAN bus fault preventing ECU identity handshake Possible
- Internal ECU failure requiring replacement Less Likely
Can I Still Drive with JD-SPN631-FMI19?
Yes, with caution. JD-SPN631-FMI19 is rated serious severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
Frequently Asked Questions
What is John Deere fault code SPN 631 FMI 19?
On John Deere PowerTech engines, SPN 631 FMI 19 means: ECU Calibration Memory Fault - Received Network Data in Error. Serious code -- address promptly to avoid inducement / further damage. Service package mismatch (Gold/Silver/Bronze) will generate SPN 631 after ECU reflash -- confirm correct calibration file per serial number.
Can I keep using my John Deere tractor with SPN 631 FMI 19?
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 631 FMI 19?
Repair cost range: $600-$2,400 ECU reflash or replacement. Dealer labor on large tractors runs $180-$240/hr in 2026.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose JD-SPN631-FMI19?
Connect Service ADVISOR and read ECU ID + calibration revision; compare to current PIP.
Verify CAN backbone terminating resistors measure ~60 ohms across CAN H/L with key off.
Re-flash with the latest OEM calibration file for the serial-number range.
If reflash fails, escalate to dealer for ECU exchange -- security keys required.
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-SPN631-FMI19?
- 2015+ John Deere 7R Series (7210R, 7250R, 7290R, 7310R)
- 2015+ John Deere 9R / 9RT / 9RX Series (9370R-9620R)
- John Deere S670 / S680 / S690 combines
- John Deere 544 / 624 / 724 wheel loaders
- John Deere R4045 / R4060 self-propelled sprayers
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