Engine Controls System: 102011

102011 - P115C

Information saved in
DME

Fault code
102011 - P115C

Fault text
Air-mass sensor, plausibility: air mass too low in relation to
model

Fault description
The diagnostic function compares the air mass calculated
from the model with the measured air mass.

Condition for fault identification
Test condition:
The fault is recognized when the indicated air mass does not
correlate with the calculated mass airflow rate.
Potential problem source(s):
- Defective HFM, problem with airflow to HFM, clean air
tube fallen off intake air noise attenuator
- Leak within induction tract on engine-side of throttle valve
(leaks in vicinity of intake air plenum chamber, open oil
filler cap)
- Malfunction in components affecting airflow (valve lift
monitoring, position of VANOS, throttle valve, pressure
sensors....)
- Compressor bypass valve stuck in open position
(accompanied by low boost pressure malfunction)
- Severely contaminated air filter
Terminal condition: Terminal 15
Voltage condition:
- Onboard electrical system voltage between 9 V and 16 V
Temperature condition:
- 30 °C < intake-air temperature < 120 °C
- -30 °C < coolant temperature
Time condition:
- None
Other conditions:
- Engine on
- Pressure drop at throttle valve exceeds 18 hPa
- 745hPa < barometric pressure
- 500 rpm < engine speed < 7000 rpm
- 133 rpm < dynamic rpm response (rpm window)
- 7.7% < dynamic load response (load window)

Condition for fault memory entry
This fault is logged in the control module's fault memory
immediately.

Action in service
- Check wiring harness on HFM
- Check intake system for leaks on engine side of throttle
valve
- Seal on oil filler cap is defective
- Problem with airflow to HFM (air filter insert is defective
or installed incorrectly)
- Replace HFM

Fault effect and breakdown warning
Breakdown notice:
- none
Possible apparent symptoms:
If the HFM is recognized as defective it is deactivated,
following jerk during deactivation owing to lambda error no
limitations

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

Service instruction
none