P0450 Code - Evaporative Emission Control System Pressure Sensor Malfunction

What Does P0450 Mean?

OBD-II Code P0450 is defined as a Evaporative Control System Pressure Sensor Low Input

The Code P0452 indicates that the Evaporative Pressure Sensor is indicating pressure change values that are below specification, during the EVAP Monitor test and/or the operation of the vehicle.

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What are the common causes of P0450 ?

These may include a faulty or improperly installed fuel cap, a faulty purge control solenoid, clogged or broken charcoal canister, broken or cracked vacuum or fuel vapor hoses, a faulty pressure or flow sensor, or a bad PCM. PCM failure is rare.

How do you troubleshoot P0450 ?

With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data.



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