P0448

P0448 - Evaporative Emission System: Vent Control Circuit Shorted






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 Close 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
If the surge & output voltage is satisfied with threshold value, the ECM determines that a fault exists and a DTC is stored.

Detecting Condition and Specifications





Wiring Schematic