MID 128, PID 108 Barometric
pressure
FMI 2 – Data erratic, intermittent or incorrect
Fault code explanation: Plausibility
Fault indication: DCU: None.
CIU: None.
Flash code
Electrical fault: None.
Value fault: None.
Conditions for fault code: Internal fault in the engine control unit.
Suitable action: 1 Replace the engine control unit (EMS 2).
FMI 3 – Voltage above normal or shorted high
Fault code explanation: Faulty sensor / Faulty sensor circuit
Fault indication: DCU: None.
CIU: None.
Flash code
Electrical fault: None.
Value fault: None.
Symptom: Ambient pressure is set to 1.0 bar.
Conditions for fault code: Internal fault in the engine control unit.
Suitable action: 1 Replace the engine control unit (EMS 2).
FMI 4 – Voltage below normal or shorted to lower voltage
Fault code explanation: Faulty sensor / Faulty sensor circuit
Fault indication: DCU: None.
CIU: None.
Flash code
Electrical fault: None.
Value fault: None.
Symptom: Ambient pressure is set to 1.0 bar.
Conditions for fault code: Internal fault in the engine control unit.
Suitable action: 1 Replace the engine control unit (EMS 2).
Circuit description
Sensor is placed inside the engine control unit.
30-2 Fault Tracing
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