Cummins Fuel Fault Codes

Cummins fault code 118 is commonly related to coolant temperature signal issues, depending on engine family and calibration.

Cummins fault code 119 is commonly associated with coolant temperature sensor rationality or signal range issues.

Cummins fault code 259 commonly relates to fuel system pressure, fuel delivery, or sensor performance depending on engine family.

Cummins fault code 268 generally points to fuel delivery, fuel pressure control, or injector-related performance.

Cummins fault code 271 is commonly associated with an injector circuit or injector performance concern.

Cummins fault code 272 commonly points to an injector circuit or injector performance fault.

Cummins fault code 428 is commonly related to water-in-fuel detection or fuel quality monitoring.

Cummins fault code 559 commonly indicates that the fuel system cannot maintain commanded fuel rail pressure.