P0503

1B0108 - P0503

Information saved in
DME

Fault code
1B0108 - P0503

Fault text
Vehicle speed, plausibility: signal implausible

Fault description
The diagnostic function monitors the plausibility of the
speed signal.

Condition for fault identification
Test condition:
The fault is recognized when the speed signal is 0 km/h
although other operating conditions indicate that the vehicle
is moving.
Potential problem source(s):
L4 Wheelspeed sensor at left front, wire or EHB3 is
defective
L6 FlexRay bus fault, ICMQL, DSC, wheelspeed sensors
Terminal condition: none
Voltage condition:
- Electrical system voltage > 10 V
Temperature condition:
- None
Time condition:
- None
Other conditions:
- E7X: Mass airflow > 272 mg/stroke; engine speed > 2820
rpm
- F01: Drive torque > 46 Nm; engine speed > 1450 rpm

Condition for fault memory entry
The fault is logged in the fault memory if it remains
continuously present for longer than 5 sec.

Action in service
E7X: Perform fault diagnosis in DSC
F01: Process faults related to wheelspeed sensors

Fault effect and breakdown warning
Breakdown notice:
- none
Possible apparent symptoms:
- none

Driver information
Warning light:
- ECE emissions warning lamp: off
- US emissions warning lamp: on
- ECE electronic engine power reduction: off
- US electronic engine power reduction: off
- CC message: none

Service instruction
- none