On-Board Diagnostics

Type of diagnosis: 

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

Enable criteria: 

• Crankshaft stationary, even after ignition OFF. Car stationary. The other two absolute pressure sensors deviate less than 10 kPa from each other.

Fault criteria: 

• Sensor value deviates more than 15 kPa from charge air absolute pressure sensor or intake air absolute pressure sensor.

Dependents: 

• P0336  and P0337 .

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.