2010 BMW 128i Convertible (E88) L6-3.0L (N52K) P Code Charts
none
P0071
2F99 – P0071
Information saved in
DME
Fault code
2F99 – P0071
Fault text
Ambient temperature sensor, plausibility
Fault description
Ambient Air Temperature Sensor Range/Performance
Condition for fault identification
Test condition:
PLAUS
Terminal condition: no invariable debounce time, constant
sensor data reading during engine warm-up produces entry
Voltage condition:
Terminal 15 ON
Condition for fault memory entry
Plausibility monitoring of ambient temperature sensor with
end of start phase recognized
Action in service
Constant, invariable sensor signal:
Sticking sensor, sensor manipulation
47
Fault effect and breakdown warning
Driver information
Warning light:
1) Visual inspection of sensor
2) Electrical check on sensor wire and power supply wire
2) Check sensor data response to motion
