P3049

11A401 - P3049

Information saved in
DME

Fault code
11A401 - P3049

Fault text
Fuel high pressure on enabling of injection: pressure too low

Fault description
The diagnostic function monitors pressurization in the high-
pressure fuel system while the engine is starting.

Condition for fault identification
Test condition:
The fault is recognized when the pressure in the high-
pressure system is below 10 ... 30 bar after the engine start.
Potential problem source(s):
- High-pressure pump defective
- Defective injector
- Defective electric fuel pump
Terminal condition: Terminal 15
Voltage condition:
- Electrical system voltage > 10 V
Temperature condition:
- None
Time condition:
- None
Other conditions:
- none

Condition for fault memory entry
The diagnostic fault code is logged when the fault persists
for longer than 20 ms.

Action in service
- Measurement of presupply pressure at engine start, if
presupply pressure is too low replace the electric fuel pump
- Measurement of rail pressure at engine start, if rail
pressure rise is too slow then replace the high-pressure
pump
- Replace injectors

Fault effect and breakdown warning
Breakdown notice:
- The engine reverts to the limp-home mode, continued
driving possible but subject to severe restrictions, stop and
wait for service assistance as soon as possible.
Possible apparent symptoms:
- Loss of power

Driver information
Warning light:
- ECE emissions warning lamp: on
- US emissions warning lamp: on
- ECE electronic engine power reduction: off
- US electronic engine power reduction: off
- CC message: none

Service instruction
- none