P0071

P0071

Diagnosis information - Control unit DME (DFI)

Ambient temperature via CAN

Diagnostic conditions
- NO fault stored in Control unit DME (DFI)
- Driving > 80 km/h > 15 Minute(s)
- then Driving > 1 Minute(s) under the following conditions :
- Coolant temperature 47 ... 108 °C (°F)
- Engine speed 1200 ... 4000 1/min
- Vehicle speed 30 ... 180 km/h

Possible fault causes
- Ambient temperature incorrect (Sensor incorrectly trimmed / Faulty)
- Intake air temperature incorrect (Sensor incorrectly trimmed / Faulty)
- only Turbo:
- Charge air cooler Blocked , Faulty , changed ...

Fault setting condition(s)

INFORMATION
The temperature model depends mainly on the measured intake air temperature.
- Deviation between Ambient temperature via CAN and Substitute value from model > 25 °C (°F)

Fault effects
- Substitute value from model
- Positive crankcase ventilation is continuously activated if a fault is present when recording the ambient temperature.