Freightliner Diesel Fault Codes
35 Freightliner diagnostic pages, grouped by the system the code belongs to. Each page covers symptoms, the tests to run in order, tools needed, and realistic parts and labor cost ranges.
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Aftertreatment (7)
- SPN 3246 FMI 3 — DPF Outlet Gas Temperature Sensor
- SPN 3464 FMI 10 — Aftertreatment SCR Catalyst
- SPN 3509 FMI 14 — Sensor Supply Voltage 1
- SPN 3609 FMI 3 — DPF #1 Intake Pressure Sensor
- SPN 4094 FMI 16 — DPF Soot Load
- SPN 4364 FMI 18 — SCR NOx Conversion Efficiency
- SPN 5246 FMI 31 — SCR Operator Inducement
Fuel (5)
Air/Turbo (6)
Coolant (3)
Sensors/Other (14)
- Guide Cascadia-Codes — Freightliner Cascadia Frequent Fault Codes
- SPN 84 FMI 8 — Wheel-Based Vehicle Speed Sensor
- SPN 91 FMI 2 — Accelerator Pedal Position Sensor
- SPN 100 FMI 1 — Engine Oil Pressure
- SPN 100 FMI 3 — Engine Oil Pressure Sensor Circuit
- SPN 168 FMI 4 — Battery / ECU Power Supply Voltage
- SPN 173 FMI 3 — Engine Exhaust Gas Temperature Sensor
- SPN 175 FMI 3 — Engine Oil Temperature Sensor
- SPN 190 FMI 0 — Engine Speed Sensor Circuit
- SPN 630 FMI 12 — ECM Calibration Memory
- SPN 636 FMI 2 — Crankshaft Position Sensor
- SPN 639 FMI 9 — J1939 Data Link (CAN Network #1)
- SPN 646 FMI 14 — Wastegate Drive
- SPN 3509 FMI 16 — Sensor Supply Voltage 1