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P0457 — EVAP System Leak Detected (Fuel Cap Loose/Off)

The EVAP system specifically detected the fuel cap is loose or not sealing.

Severity: LowRepair: $0-$50Difficulty: Easy

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Common symptoms of P0457

Common causes of P0457

Repair cost & difficulty

Typical cost to fix P0457: $0-$50 · Difficulty: Easy

Pro tip: Tighten gas cap until it clicks. If persists, buy a new cap ($10-25). It will clear itself after 50-100 miles.

Vehicles commonly affected

All makes

Related trouble codes

P0440P0455P0456

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ScanFixAI is a diagnostic aid, not a substitute for professional repair. Cost estimates are typical ranges and vary by vehicle and region.