P3000

3F40 - P3000

Information saved in
DDE

Fault code
3F40 - P3000

Fault text
DDE: Rail pressure sensor, offset test: Offset maximum
exceeded

Fault description
Rail-pressure sensor offset test monitoring function. If the
raw value for rail pressure (voltage) remains, for the period
of 30 ms during engine start, above the threshold 648 mV or
for the period 100 ms at shutdown it remains above the
threshold 648 mV the offset in the positive direction is too
large and the DTC is logged.

Condition for fault identification
Test condition:
The test routine is executed according to the programmed
time grid.
The error check is performed when the following conditions
are active:
- No electrical diagnostic trouble codes logged.
- Engine is in post-operational shutdown phase.
Voltage condition:
The test routine is executed according to the programmed
time grid.
The error check is performed when the following conditions
are active:
- No electrical diagnostic trouble codes logged.
- Engine is in post-operational shutdown phase.

Condition for fault memory entry
-At start: 30 ms
In post-operational shutdown phase: 100 ms

Action in service
1. Check wires and plug connections.
Check connections for corrosion!
2. If wiring and plug connections are OK:
Replace rail-pressure sensor.

Fault effect and breakdown warning
Proceed to the nearest BMW Service facility.

Driver information
Warning light:
MIL

Service instruction
none