Group 30: Electrical system Diagnostic Trouble Codes
133
MID 128, PSID 96
Rail pressure system
MID 128: Engine control unit
FMI 0: The sensor value is valid but above the nor-
mal working range.
FMI 1: The sensor value is valid but below the nor-
mal working range.
FMI 4: The voltage is less than the normal value or
is short circuited to lower voltage.
FMI 7: Mechanical fault. The system responds in-
correctly.
FMI 12: Faulty unit or component.
FMI Fault code explanation
0, 1, 4, 7, 12 Fault in rail pressure circuit
Fault indication
DCU: Engine warning in DCU display.
CIU: None
Lamp status
FMI 0, 12: Yellow lamp
FMI 1, 4, 7: Red lamp
Flash code
Electrical fault: 8.3
Value fault: None
Symptom
FMI 0: Engine derated: engine speed limita-
tion (1100 rpm). Full fuel flow delivery.
Limp home with pressure relief valve
opened.
FMI 1, 7, 12: Engine derated: engine speed limita-
tion (1100 rpm). Fuel pressure limita-
tion (800 bar). Engine torque reduc-
tion.
FMI 4: Engine derated: engine speed limita-
tion (1100 rpm). Fuel pressure limita-
tion (800 bar). Engine torque reduc-
tion. Engine shut off or difficult to
start.
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