General Information

Engine Control

P0448 Evaporative Emission System - Vent Control Circuit Shorted - General Information

Component Location





General Description

The Evaporative Emission Control System (EVAP) prevents hydrocarbon (HC) vapors in the fuel tank from escaping into the atmosphere where they could form photochemical smog. Gasoline vapors are collected in the charcoal canister. The Purge Control Solenoid Valve (PCSV) is actuated (duty cycled) by the Powertrain Control Module (PCM) to control vapor flow from the canister to the intake manifold.

DTC Description

Checking output signals from CCV every 10 sec. under detecting condition, if signals indicating short to battery in the circuit are detected for more than 5 sec, ECM sets P0448. MIL (Malfunction Indication Lamp) turns on when the malfunction lasts till consecutive 2 driving cycle.

DTC Detecting Condition





Specification





Diagnostic Circuit Diagram