P0452

Read the instructions below then start the fault diagnostic procedure.

Symptom: CHECK ENGINE.

P0452

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

-	General condition for this diagnostic trouble code: Atmospheric pressure must exceed 72 kPa as well as coolant and intake air temperature must exceed -7°C.

-	Engine running.

Fault criteria

-	Voltage below 0.300 V for more than 5 s.

Dependents

-

None

System reaction to a fault

-	Integrity diagnosis of purge system blocked.

OK report

-	Diagnoses for P1451, P1452 and P1453 performed once and fault criteria not fulfilled. Fault criteria for P0452 or P0453 not fulfilled.

Fault handling: (For more information, see .)

-

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. The value should be about 0 kPa when the filler cap is removed.

For more information, see .

Checking the wiring

Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short circuits. Observe the multimeter, diagnostic tool or test lamp during the check.