Diesel fault codes
Look up OBD-II and SAE J1939 diesel fault codes — what each one means, likely causes, and how urgent it is.
sensor codes
SPN 100 / FMI 1
Engine Oil Pressure — Below Normal (Most Severe)
sensorCritical
SPN 3242 / FMI 2
DPF Intake Gas Temperature — Data Erratic
sensorMedium
P0101
Mass Air Flow Circuit Range/Performance
sensorMedium
P0470
Exhaust Pressure Sensor Circuit
sensorMedium
P0471
Exhaust Pressure Sensor Range/Performance
sensorMedium
P0523
Engine Oil Pressure Sensor/Switch High Voltage
sensorMedium
P0546
Exhaust Gas Temp Sensor 1 Circuit High (Bank 1)
sensorMedium
P2080
Exhaust Gas Temp Sensor Range/Performance (B1S1)
sensorMedium
P2084
Exhaust Gas Temp Sensor Range/Performance (B1S2)
sensorMedium
P2199
Intake Air Temperature Sensor 1/2 Correlation
sensorLow
P2227
Barometric Pressure Circuit Range/Performance
sensorLow