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Cummins ISB CM550 (1990-94) Fault Code: 377 PID: SID 233 SPN: 107 FMI: 7 Fuel Pump Power Relay Stuck-On

Cummins ISB CM550 (1990-94) Fault Code: 381 PID: SID 237 SPN: 626 FMI: 11 Intake Air Heater Relay Circuit

Cummins ISB CM550 (1990-94) Fault Code: 382 PID: SID 237 SPN: 626 FMI: 11 Intake Air Heater Relay Circuit

Cummins ISB CM550 (1990-94) Fault Code: 385 PID: SID 232 SPN: 620 FMI: 3 Remote Accelerator Supply Circuit

Cummins ISB CM550 (1990-94) Fault Code: 385 PID: SID 232 SPN: 620 FMI: 1 Remote Accelerator Supply Circuit

Cummins ISB CM550 (1990-94) Fault Code: 386 PID: SID 232 SPN: 620 FMI: 3 Sensor Suppy Circuit

Cummins ISB CM550 (1990-94) Fault Code: 386 PID: SID 232 SPN: 620 FMI: 4 Sensor Suppy Circuit

Cummins ISB CM550 (1990-94) Fault Code: 387 PID: 91 SPN: FMI: 3 Accelerator Position Sensor Circuit

Cummins ISB CM550 (1990-94) Fault Code: 387 PID: SID 232 SPN: FMI: 3 Accelerator Position Sensor Circuit

Cummins ISB CM550 (1990-94) Fault Code: 387 PID: 91 SPN: FMI: 1 Accelerator Position Sensor Circuit