P0448

DTC P0448 EVAP Emission Control System Vent Circuit Shorted

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.

Detecting Condition & Limp Home:

DTC DETECTING CONDITION

1. DTC Description
ECM sets DTC P0448 if the ECM detects that the CCV control line is short to ground or short to battery line.

2. Conditions for Setting the DTC

Specification:

Schematic Diagram:

Step 1 - 3:

Step 4 - 5:

Inspection Procedure