SAAB WIS ONLINE

EDC16 / 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.

  P0234 5B


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:

Continuous

Enable criteria:

Engine running.
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.