Detroit Diesel Fault Codes
55 Detroit Diesel 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 (24)
- Guide DD15-OneBox — Detroit DD15 One-Box Aftertreatment
- Guide DDDL-SCR — Detroit DDDL SCR Derate Diagnostics
- SPN 1761 FMI 18 — DEF Tank Level Sensor
- SPN 3216 FMI 0 — SCR Intake NOx Sensor
- SPN 3226 FMI 0 — SCR Outlet NOx Sensor
- SPN 3226 FMI 0 — SCR Outlet NOx Sensor
- SPN 3226 FMI 13 — Outlet NOx Sensor
- SPN 3242 FMI 1 — DPF Intake Gas Temperature Sensor
- SPN 3242 FMI 3 — Aftertreatment #1 DPF Intake Gas Temperature Sensor
- SPN 3242 FMI 16 — DPF Intake Gas Temperature Sensor
- SPN 3251 FMI 0 — DPF Differential Pressure
- SPN 3251 FMI 16 — Diesel Particulate Filter Differential Pressure
- SPN 3361 FMI 9 — DEF Tank Level
- SPN 3362 FMI 9 — DEF Tank Temperature
- SPN 3719 FMI 0 — DPF Ash Load
- SPN 3719 FMI 1 — DPF Ash Load
- SPN 3719 FMI 16 — DPF Ash Load
- SPN 4094 FMI 16 — DPF Soot Load
- SPN 4363 FMI 0 — SCR Outlet Gas Temperature Sensor
- SPN 4364 FMI 1 — SCR NOx Efficiency
- SPN 4364 FMI 18 — Aftertreatment SCR Catalyst
- SPN 5246 FMI 0 — SCR Inducement
- SPN 5246 FMI 16 — SCR Inducement
- SPN 5394 FMI 3 — DEF Tank Heater Circuit
Fuel (8)
- SPN 97 FMI 15 — Water-In-Fuel (WIF) Sensor
- SPN 157 FMI 4 — Injector Metering Rail 1 Pressure
- SPN 652 FMI 6 — Injector Solenoid Driver Circuit - Cylinder #2
- SPN 654 FMI 6 — Fuel Injector Cylinder 4
- SPN 655 FMI 6 — Injector Cylinder 5
- SPN 1322 FMI 31 — Multiple Cylinder Misfire Detection
- SPN 1382 FMI 16 — Fuel Filter Differential Pressure Sensor
- SPN 3480 FMI 1 — Hydrocarbon (HC) Doser Fuel Supply Pressure
Air/Turbo (5)
Coolant (3)
Sensors/Other (15)
- SPN 51 FMI 3 — Accelerator Pedal Position (APP) Sensor
- SPN 91 FMI 2 — Accelerator Pedal Position Sensor
- SPN 91 FMI 4 — Accelerator Pedal Position
- SPN 100 FMI 1 — Engine Oil Pressure Sensor
- SPN 100 FMI 2 — Engine Oil Pressure Sensor / Oil Pressure Circuit
- SPN 100 FMI 17 — Engine Oil Pressure
- SPN 168 FMI 0 — Battery / ECU Power Supply Voltage
- SPN 175 FMI 0 — Engine Oil Temperature Sensor
- SPN 513 FMI 2 — Actual Engine Percent Torque
- SPN 646 FMI 5 — Wastegate Actuator Drive Circuit
- SPN 723 FMI 2 — Camshaft Position Sensor
- SPN 1188 FMI 3 — Turbocharger Wastegate Actuator 1 Position
- SPN 1569 FMI 31 — Engine Protection Torque Derate
- SPN 2659 FMI 18 — Turbocharger
- SPN 3031 FMI 10 — EGR Valve