P0111

P0111

Intake Air Temperature Sensor - Signal Implausible

Diagnostic conditions
- Battery positive voltage between 10 V and 16 V
- Engine starting temperature below 50 °C
- Engine temperature above 70 °C
- Vehicle speed = 20-35 km/h.
- Intake mass air flow 80-300 kg/h
- No relevant faults (vehicle speed and engine temperature)

Possible cause of fault
- Intake air temperature sensor faulty (short circuit or contact resistances)

Affected terminals
Turbo : DME control module connector B, pin 108, and boost pressure sensor connector, pin 1
Turbo : DME control module connector A, pin 26, and boost pressure sensor connector, pin 2
Naturally aspirated engine : DME control module plug A, pin 26, and pin 1 of MAF sensor plug
Naturally aspirated engine : DME control module plug A, pin 27, and pin 3 of MAF sensor plug

Diagnosis/troubleshooting







MAF sensor







Boost-pressure sensor

NOTE:
- In the case of the turbo engine, the intake air temperature sensor is integrated into the boost pressure sensor.
- In the naturally aspirated engine, the intake air temperature sensor is integrated into the MAF sensor 1 (right).
- Naturally aspirated engines only: In Step 4, the MAF sensor must not be removed, but only replaced complete with the tubular piece.
- A diagonal exchange is possible because both the MAF sensors (including tubular piece) are identical, but the intake air temperature sensor is only used on the right.