Fault Conditions

Internal Control Module. Malfunction.







Fault symptoms
- CHECK ENGINE.
- Possible loss of power before trouble code generated.

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: Fault Handling III, Other Emission-Related Component & Function
- Type III.

Diagnostic help
Fault diagnosis concerns an electrical fault in connecting leads or in the sensor.

Functions in the diagnostic tool related to the fault:
- Diagnostic status for the diagnosis.
- Pressure sensor value, unit kPa.

With the engine stationary, the value should correspond with the two other pressure sensors. Accepted difference is 10 kPa.

For information, Tech 2 Menu Structure, DTC Menu, Read Value, Activate, Sys Info

Proceed to Diagnostic Procedures Changing Components