439 – HI P-Fuel 2 (Common Rail)
ZKP-Number: 2.0116.931
Rail pressure > set value
Red alarm - DBR fuel limitation, start of injection readjusted towards late
Cause
Corrective action
HP fuel block jamming or HP
fuel control block wiring faulty.
u
Contact Service.
441 – AL System 2 Leaky
ZKP-Number: 1.8004.047
Pressure gradient in rail is too low during starting or too high during stopping
Yellow alarm - warning
Cause
Corrective action
HP system leaky, air in system.
u
Contact Service.
444 – SD U-PDU
ZKP-Number: 1.8004.578
Injection power stage supply voltage faulty
Yellow alarm - warning
Cause
Corrective action
Sensor defect of injector power
stage or internal fault of engine
governor.
1. Replace engine governor.
2. Contact Service.
445 – SD P-Ambient Air
ZKP-Number: 1.8004.580
Ambient air pressure sensor signal error
Yellow alarm - warning
Cause
Corrective action
Ambient air pressure sensor
faulty.
1. Replace engine governor.
2. Contact Service.
446 – SD P-HD2
ZKP-Number: 1.8004.599
Rail pressure sensor signal error
Yellow alarm - high-pressure regulator emergency operation
Cause
Corrective action
Rail pressure sensor faulty.
Short circuit or wire break.
1. Check sensor and wiring (B48), replace as necessary
(→ Page 194).
2. Contact Service.
84 | Troubleshooting | MS150120/00E 2014-11
TIM-ID: 0000029153 - 008