SAAB WIS ONLINE

P0244

Read the instructions below then start the fault diagnostic procedure.

Symptom: Loss of performance.

P0244


Boost Pressure too High. Mechanical Fault.



Fault symptom


Loss of performance.


On-Board Diagnostics

Type of diagnosis:


- Continuous.


Enable criteria:


- Battery voltage should be 10.2-15.8 V.

- Engine speed should be over 1700 rpm.

- Rpm changes between two measurements should not exceed a difference of 100 rpm.

- The difference between two injections should not exceed 5 mm 3 /C.

- Vehicle speed should be 40 - 220 km/h.

- Injection quantity should be 20-60 mm 3 /C.

- Intake air temperature should be -40°C -120 °C.

- Atmospheric pressure should be 70-110 kPa.

- P1636 or P1637 should not be detected.

- These conditions should be fulfilled for 2.1 seconds before diagnostics run.


Fault criteria:


- The difference between calculated and actual charge air pressure falls below 48 kPa.


Dependents:


- P0072, P0073, P0106.


System reaction to a fault:

The following limitations apply:


- Pedal position sensor adjustable to max 60%

- Maximum fuel quantity 30 mm³/combustion

- Maximum fuel pressure 60 Mpa


OK report:


- Fault criteria not fulfilled.


Fault handling:


- See Fault handling III, other emissions-related components and functions


Diagnostic help

The fault diagnosis concerns the charge pressure system and its components.

Functions in the diagnostic tool related to the fault:


- Read value: Airmass / Combustion, Mass Air Flow Sensor, Requested VNT Position, Actual VNT Position, Requested Charge Air Absolute Pressure, ( Charge Air Pressure Sensor)


See also description of read value under "Read Values" menu for more information.