P302C

11A002 - P302C

Information saved in
DME

Fault code
11A002 - P302C

Fault text
Fuel high-pressure system, fuel pressure: minimum pressure
undershot

Fault description
The diagnostic function monitors the high-pressure fuel
system to determine whether the pressure levels remain at
the specified levels.

Condition for fault identification
Test condition:
The fault is recognized when the rail pressure on Bank 1
deviates from the specified pressure by -20 bar or the
pressure regulator varies from the zero position by 20 bar for
three seconds and the lambda control or the adaptation
deviates by 20 %.
Potential problem source(s):
- High-pressure pump defective
Terminal condition: Terminal 15
Voltage condition:
- None
Temperature condition:
- None
Time condition:
- 15 sec. after engine start
Other conditions:
- none

Condition for fault memory entry
This fault is logged in the control module's fault memory if
it remains present for longer than 3 sec.

Action in service
- Replace high-pressure pump
- Delete adaptation data for fuel low-pressure control 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
- US emissions warning lamp: on
- ECE electronic engine power reduction: on
- US electronic engine power reduction: on
- CC message: none

Service instruction
- none