11A002 - P0087 (DME)

11A002 - P0087

Information saved in
DME

Fault code
11A002 - P0087

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 is below the
specified level.
Potential problem source(s):
- Fuel tank empty
- Obstruction in fuel filter
- Fuel pump defective
- Defective rail-pressure sensor
- High-pressure pump defective
Terminal condition: none
Voltage condition:
- Onboard electrical system voltage between 9 V and 16 V
Temperature condition:
- None
Time condition:
- None
Other conditions:
- Engine ON

Condition for fault memory entry
This fault is logged in the control module's fault memory immediately.

Action in service
- Check fuel level
- Check low-pressure system (filter, pump pressure and flow
rate, sensor, plugs/wiring harness), replace as indicated
- Low-pressure ECU (EKP electric fuel pump), read out
diagnostic fault codes
- Delete adaptation data for fuel low-pressure control
- Check rail pressure sensor incl. plugs/wiring harness,
replace as indicated
- Replace high-pressure pump

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