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Cummins ISB CM550 (1990-94) Fault Code: 488 PID: 105 SPN: 105 FMI: 0 Intake Manifold Air Temperature Sensor - Engine Protection Circuit

Cummins ISB CM550 (1990-94) Fault Code: 489 PID: 191 SPN: 191 FMI: 0 Auxiliary Speed or Auxiliary Pressure Input Error

Cummins ISB CM550 (1990-94) Fault Code: 515 PID: 91 SPN: 91 FMI: 4 Coolant Level Sensor Circuit

Cummins ISB CM550 (1990-94) Fault Code: 516 PID: 91 SPN: 91 FMI: 3 Coolant Level Sensor Circuit

Cummins ISB CM550 (1990-94) Fault Code: 516 PID: 91 SPN: 91 FMI: 4 Coolant Level Sensor Circuit

Cummins ISB CM550 (1990-94) Fault Code: 517 PID: 252 SPN: FMI: Fuel Pump Valve Feedback Error

Cummins ISB CM550 (1990-94) Fault Code: 524 PID: 113 SPN: 2 FMI: Switched Droop Selection Circuit

Cummins ISB CM550 (1990-94) Fault Code: 527 PID: 154 SPN: 702 FMI: 3 Dual-Output Driver A

Cummins ISB CM550 (1990-94) Fault Code: 528 PID: 93 SPN: 93 FMI: 2 Alternate (Switched) Torque Curve Switch Circuit

Cummins ISB CM550 (1990-94) Fault Code: 529 PID: SID 051 SPN: 703 FMI: 3 Dual-Output Driver B