Possible causes

– Faulty Evaporative Emission System (EVAP) Pressure sensor
– EVAP purge hose/tube obstruction
– Evaporative Emission System (EVAP) Pressure sensor harness is open or shorted
– Evaporative Emission System (EVAP) Pressure sensor circuit poor electrical connection

Tech notes

There is a factory service bulletin for the following Dodge models:

2009 Dodge Journey
2007-2009 Dodge Sebring
2007-2009 Dodge Avenger
2007-2009 Dodge Sebring Convertible
2008 Dodge Town & Country
2008 Dodge Voyager
2008 Dodge Caravan

The factory service bulletin recommends reprogramming the Powertrain Control Module (PCM) to repair the problem.

When is the code detected?

An excessively low voltage from the sensor is sent to Engine Control Module (ECM).

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P0452 DODGE Description

The Evaporative Emission System (EVAP) control system pressure sensor detects pressure in the purge line. The sensor output voltage to the Engine Control Module (ECM) increases as pressure increases. The EVAP control system pressure sensor is not used to control the engine system. It is used only for on board diagnosis.

DODGE Technical Service Bulletins for P0452 code