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DTC - Diagnostic Trouble Codes information

P0450

Powertrain Codes

P0450 - TOYOTA - Evaporative Emission Control System Pressure Sensor Malfunction

Symptoms

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

Possible Causes

- Open or short in vapor pressure sensor circuit - Vapor pressure sensor - ECM

When Detected

10 seconds or less after engine starting condition vapor pressure sensor fixed value continues for fixed value or more.

Description

The 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 ECM decides whether there is an abnormality in the evaporative emission control system based on the vapor pressure sensor signal. DTC P0450 is recorded by the ECM when the vapor pressure sensor malfunction.