SPN 91/FMI 4 The typical diagnosis for this fault is circuit failed low.‪ Check as follows:‪ Disconnect the Accelerator Pedal (AP). Turn ON the ignition…

SPN 97/FMI 3 SPN 97/FMI 3 indicates a Water-in-Fuel Sensor open circuit.‪ Check as follows:‪ Check for multiple codes. If any EGR faults are active…

SPN 100/FMI 3 A typical diagnosis is an Engine Oil Pressure Sensor circuit failed high.‪ Check as follows:‪ Turn the ignition ON (key On, engine…

SPN 100/FMI 1 SPN 100/FMI 1 is typically low engine oil pressure.‪ Check as follows:‪ Check for multiple codes. If fault codes 100/1 and 100/3…

SPN 100/FMI 18 This diagnosis is typically very low oil pressure. ‪ Check as follows:‪ Check for additional active fault codes. If fault code 100/3…

SPN 100/FMI 4 This diagnosis is typically an Engine Oil Pressure Sensor circuit failed low. ‪ Check as follows:‪ Turn the ignition ON (key On,…

SPN 103/FMI 0 This diagnosis is typically turbocharger speed below threshold (Low Box).‪ Check as follows:‪ Inspect the entire air intake system for leaks and/or…