P0455 on a 2013 Honda Cr V

P0455 means the EVAP system failed a leak check badly enough that the computer sees a large leak or no pressure/vacuum change.

Not your vehicle? See general P0455 info.

Most common causes on the 2013 Honda Cr V

Ranked from 381 NHTSA owner complaints filed for this vehicle.

Sort by:

1
Rodent damage to a fuel or EVAP system line
Medium severity
One owner had high-pressure fuel lines punctured by squirrels in two separate incidents, leaking fuel into the engine bay — rodent-chewed lines are a well-known large-leak source.
Reported in 1 NHTSA complaint
Parts:EVAP hose fuel line
2
Fuel tank, filler neck, or EVAP hose leak
Medium severity
An intermittent gasoline smell reported while driving is consistent with a fuel/EVAP-side leak.
Reported in 1 NHTSA complaint
Parts:fuel tank EVAP hose
3
Loose or damaged fuel filler cap
High severity
The single most common cause of a large EVAP leak code; check the cap seals and threads first.
Common cause
Parts:fuel cap
4
Rusted or corroded fuel tank / filler neck
High severity
Corrosion at tank seams or the filler neck is a known leak source as these vehicles age.
Common cause
Parts:fuel tank filler neck
5
Charcoal canister crack or stuck-open vent valve
Medium severity
A cracked canister or vent valve that won't close produces an easily-detected large leak.
Common cause
Parts:charcoal canister EVAP vent valve
6
Cracked or disconnected EVAP hose/line
Medium severity
A fully split or disconnected purge/vent line reads as a large leak.
Common cause
Parts:EVAP hose

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These causes are aggregated from NHTSA owner complaints and general repair knowledge — this is not a diagnosis. P0455 on your car still needs shop confirmation before any repair.

Common symptoms

Check engine light
Fuel smell
Usually no performance issue
Failed emissions readiness

What to check before replacing parts

Check the gas cap first

Look for: A loose, missing, or cross-threaded cap is by far the most common cause of a large EVAP leak code — if it doesn't click to full tightness or the seal is cracked, that's very likely the whole fault.

Inspect visible EVAP hoses

Look for: A large leak is often obvious: a hose disconnected at a fitting, split open, or chewed through (rodent damage is common) rather than a hairline crack.

Command the purge and vent valves with a scan tool

Look for: A valve that doesn't respond at all when commanded open/closed, or stays open when it should seal, prevents the system from holding pressure/vacuum and reads as a large leak.

Smoke-test the system

Look for: With a large leak, expect an obvious plume of smoke or a clearly audible hiss at the fault location — it should be easy to spot compared to a small-leak diagnosis.

Inspect the canister and filler neck

Look for: A cracked charcoal canister housing or a corroded/rusted-through filler neck (common on older vehicles) can leak enough to prevent the system from ever holding vacuum.

Rather have a pro handle it? Find a vetted local mechanic.

Matching symptoms

Check Engine Light