AutoCodes – Scion – P0450 Scion

P0450 Scion Code - Evaporative Emission Control System Pressure Sensor/Switch

Quick Answer

The Evaporative Emission System (EVAP) vapor pressure sensor, VSV for canister closed valve (CCV) and VSV for pressure switching valve are used to detect abnormalities in the evaporative emission control system. Common causes include Faulty Evaporative Emission System (EVAP) Vapor Pressure Sensor, Evaporative Emission System (EVAP) Vapor Pressure Sensor harness is open or shorted, Evaporative Emission System (EVAP) Vapor pressure sensor circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: P0450 Scion indicates Evaporative Emission Control System Pressure Sensor/Switch.
Common causes: Common causes include Faulty Evaporative Emission System (EVAP) Vapor Pressure Sensor, Evaporative Emission System (EVAP) Vapor Pressure Sensor harness is open or shorted, Evaporative Emission System (EVAP) Vapor pressure sensor circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 6,659

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P0450 Scion Description

The Evaporative Emission System (EVAP) vapor pressure sensor, VSV for canister closed valve (CCV) and VSV for pressure switching valve are used to detect abnormalities in the evaporative emission control system. The Engine Control Module (ECM) decides whether there is an abnormality in the evaporative emission control system based on the vapor pressure sensor signal.

OBDII Code P0450 Scion - Evaporative Emission Control System Pressure Sensor/Switch - AutoCodes.com — P0450 Scion Code - Evaporative Emission Control System Pressure Sensor/Switch

What does this mean?

What are the Possible Causes of the DTC P0450 Scion?

Faulty Evaporative Emission System (EVAP) Vapor Pressure Sensor
Evaporative Emission System (EVAP) Vapor Pressure Sensor harness is open or shorted
Evaporative Emission System (EVAP) Vapor pressure sensor circuit poor electrical connection
EVAP system hose (pipe from air inlet port to canister pump module, canister filter, fuel tank vent hose)
Faulty Engine Control Module (ECM)

How to Fix the DTC P0450 Scion?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0450 Scion code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0450 Scion code?

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Information for Specific Scion Models

P0450 2005 Scion xB — Evaporative Emission Control System Pressure Sensor/Switch
P0450 2006 Scion xB — Evaporative Emission Control System Pressure Sensor/Switch
P0450 2007 Scion xB — Evaporative Emission Control System Pressure Sensor/Switch

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.