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Cummins ISB CM550 (1990-94) Fault Code: 599 PID: SID 025 SPN: 640 FMI: 14 Auxiliary Commanded Dual Output Shutdown - Special Instructions

Cummins ISB CM550 (1990-94) Fault Code: 768 PID: SID 009 SPN: 923 FMI: 11 Output Device Driver (Trransmission Shift Modulation)

Cummins ISB CM550 (1990-94) Fault Code: 779 PID: SID 051 SPN: 703 FMI: 11 OEM Input - Engine Protection

Cummins ISB CM550 (1990-94) Fault Code: 2559 PID: SPN: 1845 FMI: 4 Transmission ECU to ECM Communication - Abnormal Update Rate

Cummins ISB CM550 (1990-94) Fault Code: 111 PID: SID 254 SPN: 629 FMI: 12 Engine Control Module - critical internal failure. Error internal to the ECM related to memory hardware failures or internal ECM voltage supply circuits.

Allison 3000 & 4000 Gen 4 Fault Code: C1313 Retarder Request Sensor Failed High

Allison 3000 & 4000 Gen 4 Fault Code: P0122 Pedal Position Sensor Circuit Low Voltage

Allison 3000 & 4000 Gen 4 Fault Code: P0123 Pedal Position Sensor Circuit High Voltage

Allison 3000 & 4000 Gen 4 Fault Code: P0218 Transmission Fluid Over-Temperature

Allison 3000 & 4000 Gen 4 Fault Code: P0562 System Voltage Low