Service Buddy
Emissions

Code P0455

EVAP System Large Leak

Plain English Meaning:Large fuel vapor leak detected

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Yellow: Drive with Caution

Fuel vapor leaks can be hazardous

P0455 Symptoms

  • Strong fuel smell check engine light

Most Common Causes of P0455

1Loose gas cap broken EVAP lines

P0455 Repair Playbook

Required Mechanic Tests

A qualified shop should perform these tests before replacing any parts to ensure they aren't guessing:

Smoke test inspect tank and hoses

Typical Fix Paths & Estimated Costs

Fix leaks $50–$600

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Parts for P0455 Repair

Common replacement parts for emissions codes. (Paid links)

Oxygen (O2) Sensor
$25–$80 · Est. Price
Catalytic Converter
$150–$400 · Est. Price
EGR Valve
$40–$120 · Est. Price

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