P0455 on a 2017 Jeep Renegade

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 2017 Jeep Renegade

Ranked from 560 NHTSA owner complaints filed for this vehicle.

Sort by:

1
EVAP leak at the fuel pump/sender assembly
Medium severity
Two owners of this exact vehicle had a dealer diagnostic confirm an EVAP leak traced to the in-tank fuel pump/sender assembly, one following the fuel-pump recall repair, with the technician reporting a gasoline smell — large enough to be noticeable and consistent with a large-leak code.
Reported in 2 NHTSA complaints
Parts:fuel pump assembly
2
Vent valve stuck open
Medium severity
One owner describes the fuel nozzle repeatedly clicking off during fueling and a failed smog check, consistent with a vent-side fault that can also manifest as a large detected leak.
Reported in 1 NHTSA complaint
Parts:vent valve
3
Loose or missing gas cap
Low severity
A cap left loose, cross-threaded, or with a failed seal is the most common cause of a large-leak EVAP code.
Common cause
Parts:gas cap
4
Disconnected or split EVAP purge/vent hose
Medium severity
A hose that pops off or splits creates a large, easily detected leak path.
Common cause
5
Cracked charcoal canister
Medium severity
A larger crack in the canister housing produces a leak big enough to set the large-leak code rather than the small-leak one.
Common cause
Parts:charcoal canister
6
Rusted or holed fuel filler neck
Medium severity
Corrosion through the filler neck creates a continuous, substantial leak path.
Common cause

Part links go to Amazon search results for this vehicle. As an Amazon Associate, WrenchConnect earns from qualifying purchases — always confirm fitment for your exact trim and engine before ordering.

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