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P0448

Low Severity

EVAP Vent Control Circuit Shorted

EVAP System

What Does P0448 Mean?

Short circuit in the vent valve.

Common Fix

Replace vent valve

Estimated Cost (DIY)

$20 - $60

Symptoms

  • ⚠️Check engine light

Common Causes

Shorted valvelikely
Wiring shortpossible

How to Diagnose P0448

  1. 1Check wiring
  2. 2Replace valve

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Related Codes

Frequently Asked Questions

What happens if the vent valve is stuck closed?
The fuel tank cannot breathe properly, potentially causing pressure buildup or vacuum in the tank.
Can a vent valve cause hard fueling?
Yes β€” if the vent valve is stuck, the tank builds pressure, and the fuel pump nozzle clicks off repeatedly at the gas station.

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