SPN 3058 FMI[10,16,18] Engine Faults Explained

SPN 3058 means that the EGR system monitor has a problem. Each FMI is different as shown below.

FMI 10 – Abnormal rate of change

FMI 16 – Data valid but above normal – moderately severe

FMI 18 – Data valid but below normal – moderately severe



Things to check:
motor control module software version
EGR sensor
Clean exhaust gas recirc system



Other SPN codes: