11AA04

11AA04 - P306C

Information saved in
DME

Fault code
11AA04 - P306C

Fault text
Fuel supply system: Pressure too high for a short time,
engine speed and load are restricted

Fault description
The diagnostic function monitors the fuel pressure.

Condition for fault identification
Test condition:
The fault is recognized when the rail pressure rises above
maximum limit of 22 bar.
Potential problem source(s):
- Collateral fault caused by extreme pressure spikes in high-
pressure fuel system
Terminal condition: none
Voltage condition:
- Onboard electrical system voltage between 9 V and 16 V
Temperature condition:
- None
Time condition:
- None
Other conditions:
- none

Condition for fault memory entry
The diagnostic fault code is logged when the fault remains
present for longer than 1 min.

Action in service
- Work through any other diagnostic fault codes related to
fuel pressure system.

Fault effect and breakdown warning
Breakdown notice:
The engine reverts to its limp-home program, continued
vehicle operation is possible but drivability is restricted,
because power is reduced the driver should refrain from
passing maneuvers.
Possible apparent symptoms:
- Loss of power

Driver information
Warning light:
- ECE emissions warning lamp: on
- ECE electronic engine power reduction: on
- CC message: on
- US emissions warning lamp: on
- US electronic engine power reduction: on
- CC message: on

Service instruction
None