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P0448 Powertrain

EVAP System Vent Control Circuit Shorted

EVAP vent valve drive circuit shorted to ground or B+. The vent valve seals the canister during pressure-test diagnostics.

Affected components

  • Evap vent valve

Common causes

  • High likelihood: Short in drive line

Possible symptoms

  • Check engine light on
  • Possible smell of fuel near tank or engine bay
  • Failed emissions inspection
  • Loose-cap warning may appear

Diagnostic notes

  • The malfunction indicator lamp may illuminate
  • This code can affect emissions

Sources

Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.

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