MTU 20V4000L32FNER Operating Instructions Manual page 140

457 – LO T-Intake Air
Yellow alarm.
Associated parameter 2.0123.921
Cause
Intake air temperature is too low
(limit value 3).
458 – LOLO T-Intake Air
Red alarm. Engine shutdown.
Associated parameter 2.0123.922
Cause
Intake air temperature is too low
(limit value 4).
459 – SD P-Coolant b. Engine
Red alarm.
Associated parameter 1.8004.627
Cause
Coolant pressure sensor before
engine faulty, short circuit or wire
break.
470 – SD T-ECU
Red alarm.
Associated parameter 1.8004.587
Cause
Temperature sensor in engine
governor ECU faulty.
472 – AL Stop SD
Red alarm. Engine shutdown.
Associated parameter 2.8006.593
Cause
Engine stopped because channel
has a "Faulty sensor".
476 – AL Crash Rec.Init Fault
Red alarm.
Associated parameter 1.8010.007
Cause
Initialization error of crash
recorder.
140 | Troubleshooting | MS150122/02E 2017-09
Corrective action
u Check ventilation system.
Corrective action
u Check ventilation system.
Corrective action
u Check sensor and cabling (B16.3), replace as necessary
(→ Page 204) (→ Page 203). Error cleared after restarting the
engine.
Corrective action
u Replace ECU.
Corrective action
u Summary alarm (for details, refer to the source alarm).
Corrective action
u Contact Service.