John Deere Fault Code
Free · no signupSPN 3510 - FMI 4
Multiple Random Sensor Faults / Low Voltage
System
Electrical
Symptom
Multiple Random Sensor Faults / Low Voltage
Diagnosis & fix steps
LOGIC: Sensor Supply Voltage #2 Circuit Low.
ACTION: Isolate the 5V reference wire bundle. Disconnect linked sensors (e.g., fuel rail pressure, oil pressure) one by one until the circuit voltage jumps back to 5.0V.
Red Seal field insights
Diagnostic Logic: A single internally shorted sensor pulls down the entire 5V reference rail, knocking out innocent companion sensors. Very common in vibrating high-hour configurations.
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