3F35 - P2279 (DDE)

3F35 - P2279

Information saved in
DDE

Fault code
3F35 - P2279

Fault text
DDE: Charge-air tube monitoring at idle: Charge-air hose
fallen off

Fault description
Monitoring for separated boost-air hose via air mass in near-
idle range with exhaust-gas recirculation deactivated. The
diagnostic trouble code is logged when the air mass
measured at the HFM falls below a limit value defined
according to operating point.

Condition for fault identification
Test condition:
The error check runs under the following conditions:
- Injection quantity lies between 2 mg/hub and 70 mg/hub.
- - Engine speed between 600 1/min and 1600 1/min.
- No other relevant diagnostic trouble code has been logged.
The test routine is executed continuously every 10 ms.
Voltage condition:
The error check runs under the following conditions:
- Injection quantity lies between 2 mg/hub and 70 mg/hub.
- - Engine speed between 600 1/min and 1600 1/min.
- No other relevant diagnostic trouble code has been logged.
The test routine is executed continuously every 10 ms.

Condition for fault memory entry
No debouncing.

Action in service
Check the following potential problem sources:
1. Leak in mass airflow system on engine-side of
compressor (boost-air hose, boost-pressure sensor, intake
manifold/plenum).
2. Defective mass-airflow sensor.

Fault effect and breakdown warning
Power loss owing to lack of air mass.
The error disables regeneration in the particulate filter.
Proceed to the nearest BMW Service facility.

Driver information
Warning light:
MIL_SVS

Service instruction
- Check air mass system for leaks.
- Perform mass airflow system test.