PSG16 / P0402 5B
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Fault indicator lamp (for further information see WIS Fault diagnosis, general)
Performance loss.
EGR Flow To High
Fault symptom
Fault indicator lamp (for further information see WIS Fault diagnosis, general)
Performance loss.
On-board diagnosis
Type of diagnosis:
Enable criteria:
| Engine speed between 1250 - 1500 and fuel quantity between 10 - 12.5 mg/combustion. |
| Engine speed between 1500 - 1750 and fuel quantity between 10 - 20 mg/combustion. |
| Engine speed between 1750 - 2750 and fuel quantity between 10 - 27.5 mg/combustion. |
| NONE of the following DTCs must be detected: |
| P0100, P0101, P0102, P0103 |
Fault criteria:
| Current EGR flow below requested EGR flow. |
| DTC limit between 150 - 300 mg air/combustion depending on the difference between fuel/combustion and rpm. |
System reaction to a fault:
| Limp Home, engine torque limitation. |
Diagnostic help
EGR valve closes after one minute at idling speed.
The DTC indicates air leakage between the mass air flow sensor and the turbocharger (including crankcase ventilation hose)
Diagnostic help
Functions in the diagnostic tool related to the fault:
| Control valve, shut-off damper |
| Control valve, shut-off damper |
| (See also description of readings/activations in diagnostic tool) |
