SPN 411 / FMI 3
EGR Differential Pressure — Voltage High
SAE J1939
egr
SPN 411
FMI 3
What it means
EGR delta-P sensor circuit short to high.
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SPN 412 / FMI 0
EGR Temperature — Above Normal (Most Severe)
egrHigh
P0401
EGR Flow Insufficient Detected
egrMedium
P0402
EGR Flow Excessive Detected
egrMedium
P0403
EGR Control Circuit
egrMedium
General reference only — always confirm against the OEM procedure for your specific engine.