On-Board Diagnostics

Type of diagnosis: 

• Continuous. But interrupted when fault criteria fulfilled and will not restart until next driving cycle.

Enable criteria: 

• Engine running.

Fault criteria: 

• Voltage from atmosphere absolute pressure sensor lower than 0.200 V for more than 1 s.

Dependents: 

• None.

System reaction to a fault: 

• Charge air adaptation blocked and zeroed. The charge air pressure start value is used as a substitute value. The purging is blocked. All diagnoses with the general condition that the atmospheric pressure must exceed 72 kPa and the engine coolant and intake air temperature must exceed -7°C are blocked.

OK report: 

• Fault criteria for P1631 , P1632  or P1633  not fulfilled.

Fault handling:  (For more information, see FAULT HANDLING III, OTHER EMISSION-RELATED COMPONENTS AND FUNCTION ).

• Type III.

Diagnostic help 

Fault diagnosis concerns internal control module fault as the sensor is integrated in the control module.

Functions in the diagnostic tool related to the fault:

• Pressure sensor value, unit kPa.

The value should correspond with that of the other two pressure sensors when the engine is stationary. Accepted deviation: 10 kPa.