General Information

Engine Control
P0449 Evaporative Emission System-Vent Valve / Solenoid Circuit - General Information

Component Location





General Description

The evaporative emissions system prevents hydrocarbon (HC) vapors from the fuel tank from escaping into the atmosphere where they could form photochemical smog. Gasoline vapors are collected in the charcoal canister. The Canister Closing Valve (CCV) closes off the air inlet into the canister for leak detection of the evaporative emission system. The CCV also prevents fuel vapors from escaping from the canister. When the engine purges the HC vapors from the canister, the clean air comes into the canister through the canister air-filter and the CCV.

DTC Description

The PCM measures pressure in the fuel tank by means of tank pressure sensor during all engine operating states except engine stop and start. PCM sets DTC P0449 if the PCM detects that the fuel tank pressure is too low as a result of the stuck closed CCV.

DTC Detecting Condition





Specification





Diagnostic Circuit Diagram