P0442 on a 2015 Dodge Durango

P0442 means the EVAP system could not hold pressure or vacuum during a leak test, but the leak is small.

Not your vehicle? See general P0442 info.

Most common causes on the 2015 Dodge Durango

Ranked from 502 NHTSA owner complaints filed for this vehicle.

Sort by:

1
EVAP venting path fault causing fuel-fill overflow
Medium severity
Several owners describe the fuel pump nozzle never clicking off / gas spilling while fueling, indicating the tank isn't venting properly — consistent with a stuck vent valve or restricted vent line that also sets EVAP leak codes.
Reported in 3 NHTSA complaints
Parts:EVAP vent valve
2
Fuel filler neck separation, crack, or clamp failure
Medium severity
Owners had the fuel filler tube/neck replaced after it separated or cracked, letting fuel vapor (and liquid) escape and triggering EVAP leak codes.
Reported in 2 NHTSA complaints
Parts:fuel filler neck
3
Charcoal (EVAP) canister crack or loose media
Medium severity
An owner's scan showed an EVAP leak with the diagnosis pointing to loose charcoal inside the canister — a known EVAP-canister failure mode.
Reported in 1 NHTSA complaint
Parts:charcoal canister
4
Missing or faulty fuel filler (gas) cap
Low severity
One owner's EVAP code was traced directly to having no functioning gas cap, the single most common small-EVAP-leak trigger.
Reported in 1 NHTSA complaint
Parts:fuel filler cap
5
Intermittent EVAP hose/line leak
Low severity
One owner's check-engine light for a fuel-line leak cleared after service but returned within days, typical of a small, hard-to-find EVAP hose leak.
Reported in 1 NHTSA complaint
Parts:EVAP hose
6
Cracked or brittle EVAP hose (general aging)
Low severity
Age-hardened EVAP hoses crack and leak vapor, especially in the engine bay heat zone.
Common cause
Parts:EVAP hose
7
Rusted or corroded filler neck
Low severity
Surface rust-through on the filler neck creates a vapor leak path.
Common cause
Parts:fuel filler neck

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. P0442 on your car still needs shop confirmation before any repair.

Common symptoms

Check engine light
Fuel smell near vehicle
Usually drives normally
Hard start after fueling in some cases

What to check before replacing parts

Tighten and inspect the gas cap

Look for: A cap that doesn't click to full tightness, has a visibly cracked or flattened seal, or is simply missing is the single most common cause of a small EVAP leak — rule it out first.

Smoke-test the EVAP system

Look for: Because this is a small leak, expect only a thin wisp of smoke or a faint hiss at one spot (a hose, seam, or valve) rather than an obvious cloud — look closely and take your time.

Check purge valve sealing

Look for: A purge valve that doesn't hold vacuum when commanded closed lets a small amount of air bleed through, which the system reads as a leak during its self-test.

Inspect hoses near the tank and engine bay

Look for: Look for small cracks, soft/collapsed spots, or a hose that has pulled loose slightly at a fitting — any of these can leak just enough to trip a small-leak code without an obvious fuel smell.

Verify vent valve operation

Look for: A vent valve that doesn't seal fully when commanded closed prevents the system from holding vacuum during its self-test, which reads as a small leak even with no physical leak in the hoses.

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

Matching symptoms

Check Engine Light