EDC16 MY07½ / P0234 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.
Cruise control not working.
No A/C function.
Boost Pressure To Low Mechanical Fault
Fault symptom
Fault indicator lamp (for further information see WIS Fault diagnosis, general)
Performance loss.
Cruise control not working.
No A/C function.
On-board diagnosis
Type of diagnosis:
Enable criteria:
| Engine speed higher than 2750 rpm |
Fault criteria:
| Current boost pressure falls below requested boost pressure for more than 4 s. |
System reaction to a fault:
| Limp Home, engine torque limitation. |
| Output to the A/C relay is switched off. |
| EGR turned off in case of fault. |
Diagnostic help
Diagnosis regards:
| • | Diagnostics compares requested and current boost pressure. A DTC is generated if the current boost pressure is lower than the requested boost pressure. |
| • | The diagnostic trouble code indicates a mechanical fault in the turbo, air leakage between turbo and intake, in the vacuum system, broken solenoid valve or misleading charge air pressure sensor. |
| • | The DTC can also be generated if the exhaust system is clogged, coked up catalytic converter for example. |
| • | Mechanical fault in the turbo unit or air leak in the system. |
