P0442 on a 2019 Ford Edge

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 2019 Ford Edge

Ranked from 736 NHTSA owner complaints filed for this vehicle.

Sort by:

1
Purge valve/solenoid failure (stuck open or not sealing)
Medium severity
This is by far the dominant pattern in this vehicle's complaints: repeated purge-valve and purge-line replacements, a scan revealing a stuck-open canister purge valve (code P0496), and a documented Purge Solenoid Valve failure that set an EVAP leak code (P0456) - all consistent with a small EVAP leak.
Reported in 8 NHTSA complaints
Parts:purge valve
2
Fuel filler cap/neck sealing issue noticed during refueling
Low severity
One owner reported consistent fuel spillage from the filler gun on refueling, which points to a filler-neck/cap sealing problem that can also trip a small EVAP leak.
Reported in 1 NHTSA complaint
Parts:fuel cap fuel filler neck
3
Loose or worn fuel filler cap
Low severity
A cap that doesn't seat and seal fully is the most common cause of a small EVAP leak code on any vehicle.
Common cause
Parts:fuel cap
4
Cracked or brittle EVAP purge/vent hose
Low severity
Age-hardened EVAP hoses can develop small cracks that leak vapor slowly enough to only trip the small-leak threshold.
Common cause
Parts:EVAP hose
5
Cracked charcoal canister
Low severity
A hairline crack in the canister housing produces a small, steady leak.
Common cause
Parts:EVAP canister
6
Corroded fuel filler neck
Low severity
Surface corrosion or pinholes in the filler neck can open a small vapor leak path over time.
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. 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.

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Matching symptoms

Check Engine Light