P0455 on a 2015 Chrysler 200

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 2015 Chrysler 200

Ranked from 1,983 NHTSA owner complaints filed for this vehicle.

Sort by:

1
Loose, missing, or faulty gas cap
Medium severity
Two separate owners on this vehicle report an explicit gas-cap warning light alongside the check-engine light — the single most common large-leak trigger.
Reported in 2 NHTSA complaints
Parts:gas cap
2
Cracked or leaking fuel tank/filler assembly
Medium severity
Two separate owners report a fuel leak traced to the fuel tank itself — large enough to be smelled/seen, consistent with a large-leak code.
Reported in 2 NHTSA complaints
Parts:fuel tank
3
Vapor (EVAP) system leak reported directly by an owner
Medium severity
One owner explicitly describes a "vape leak" (vapor leak) issue among a cluster of dash warnings on this vehicle.
Reported in 1 NHTSA complaint
4
Cracked or disconnected EVAP hoses/lines
Medium severity
A larger, more obvious leak point such as a split or disconnected hose typically triggers the large-leak variant of this code.
Common cause
5
Purge or vent valve stuck open
Medium severity
A purge or vent valve that won't seal prevents the EVAP system from holding vacuum during the monitor's self-test.
Common cause
Parts:purge valve vent valve
6
Charcoal (EVAP) canister cracks
Medium severity
A cracked or corroded canister housing is a common source of a large EVAP leak.
Common cause
Parts:EVAP canister
7
Rusted fuel filler neck
Low severity
A rusted-through filler neck creates an obvious leak path near the gas cap seal.
Common cause
Parts:fuel filler neck

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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