P1633

Read the instructions below then start the fault diagnostic procedure.

Symptom: CHECK ENGINE.

P1633

Fault symptoms

•	CHECK ENGINE.

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 higher than 4.920 V for more than 1 s.

Dependents:

-

None.

System reaction to a fault:

-	Starting charge air pressure value used as substitute value. Purge blocked.

OK report:

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

Fault handling: (See “Fault diagnosis, general” for more information.)

-

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.

See also the description of readings in ”Fault diagnosis, general” for more information.

See .