Common Truck Problems
Start with the symptom or system causing trouble. These categories connect you to published BigRigFaults diagnostic pages covering related fault codes, symptoms, causes, checks and common repairs.
DEF & SCR Problems
DEF quality, dosing, SCR efficiency and aftertreatment faults.
DPF Problems
DPF pressure, soot loading, restriction and sensor-related faults.
Regen Problems
Failed, frequent, inhibited or incomplete regeneration problems.
Engine Derate
Power reduction and engine-protection derate conditions.
NOx Sensor Problems
NOx sensor, plausibility and SCR feedback problems.
EGR Problems
EGR valve, flow, temperature and recirculation faults.
Oil Pressure Problems
Low oil pressure, sensor and lubrication-system faults.
Fuel System Problems
Fuel pressure, delivery, injector and supply-system faults.
Turbo & Boost Problems
Turbocharger, boost pressure and air-management faults.
Electrical Problems
Voltage, wiring, circuit, connector and electrical faults.
Coolant & Overheating
Coolant temperature, level and overheating-related faults.
Transmission Problems
Transmission, shifting and drivetrain-related fault information.
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