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:
Plausibility monitoring of ambient temperature sensor with
end of start phase recognized
Terminal condition: Terminal 15 ON

Condition for fault memory entry
no invariable debounce time, constant sensor data reading
during engine warm-up produces entry

Action in service
1) Visual inspection of sensor
2) Electrical check on sensor wire and power supply wire
2) Check sensor data response to motion
3) Replace sensor

Fault effect and breakdown warning


Driver information
Warning light:
MIL ON in US versions only

Service instruction
none