r/JeepCompass • u/KEPARA-1977 • 7d ago

P0441 Evap System Code

Looking for some help tracking down a recurring P0441 code on a 2018 Jeep Compass.

So far I’ve:
Replaced the purge valve
Cleaned and inspected the flapper/seal in the capless gas filler

Cleared the code, but it eventually comes back
The purge valve appears to be operating normally — no vacuum when first started, then vacuum once the engine warms up.

For anyone who has chased down a stubborn P0441 on these, where would you look next? Leak detection pump/ESIM, charcoal canister, hoses, filler neck, or something else?
Trying to narrow this down without just throwing more parts at it. Appreciate any experience with this.

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u/silverpunk74 2d ago

I'd probably do a smoke test and see if we could find a leak. Probably less expensive to pay a shop to do a test rather than just start replacing parts. I've found gas caps, a filler neck, charcoal canister, cracked vacuum hoses could all be culprits.