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P0455

Evaporative Emission (EVAP) — Large Leak Detected

Low — fix soonSafe to drive for now

Severity: Fix soon. Usually safe to drive for now.

What P0455 means

The computer found a large leak in the fuel vapor system, which usually means the gas cap is missing or loose, or a hose has come off.

Common causes

How to fix it

Check the gas cap and all EVAP hoses. If everything is connected, a smoke test will find the leak.

Can I drive with P0455?

Safe to drive, but you may smell fuel. Check the gas cap first.

Related codes

Questions, answered

Is it safe to drive with code P0455?

Generally safe to drive, but get it checked soon. Safe to drive, but you may smell fuel. Check the gas cap first.

What causes code P0455?

The most common causes are: Missing or loose gas cap; Disconnected EVAP hose; Cracked charcoal canister; Failed purge or vent valve stuck open. A scan tool and a visual check of the parts above is where a technician starts.

How do I fix code P0455?

Check the gas cap and all EVAP hoses. If everything is connected, a smoke test will find the leak.

Not repair advice. This page gives general information about code P0455 only. Cars differ by make, model and year — confirm the fault with a scan tool and have the repair done by a qualified technician.

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