P303C

11A504 - P303C

Information saved in
DME

Fault code
11A504 - P303C

Fault text
Fuel high-pressure system, measuring range: minimum
pressure undershot

Fault description
The diagnostic function monitors the sensor's operating
range.

Condition for fault identification
Test condition:
The fault is recognized when the rail pressure drops below 1
0 bar.
Potential problem source(s):
- Defect in wiring harness
- Defective rail-pressure sensor
- 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 10 sec.

Action in service
- Check wiring harness
- Replace rail-pressure sensor
- 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
- US emissions warning lamp: on
- ECE electronic engine power reduction: on
- US electronic engine power reduction: on
- CC message: none

Service instruction
- none