P0442 on a 2011 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 2011 Ford Edge
Ranked from 1,801 NHTSA owner complaints filed for this vehicle.
- 1
Cracked fuel tank or rollover valve
High severitySeven owners in this batch had the plastic fuel tank crack at the rollover/vent valve or at its mounting strap, producing a fuel smell and a small-leak EVAP code that required full tank replacement.
Reported in 7 NHTSA complaints - 2
Capless fuel filler neck seal failure
Medium severityThis generation Edge uses a capless (Easy Fuel) filler; the internal sealing flaps wear and let in a small amount of air, tripping a small-leak code on every fill — one owner in this batch was explicitly told this is a known issue with the no-cap system.
Reported in 1 NHTSA complaintParts:capless filler neck seal - 3
Loose, worn, or missing gas cap (on cap-equipped trims)
Low severityThe most common small-leak trigger on any EVAP-equipped vehicle; reseat/replace and clear codes to test.
Common causeParts:gas cap - 4
Purge or vent solenoid valve failure
Medium severityA valve that won't fully close lets a small amount of vapor/air leak past even when the system should be sealed.
Common cause - 5
Cracked charcoal canister
Medium severityRoad debris or age can crack the canister housing, producing a small but steady leak.
Common causeParts:EVAP charcoal canister - 6
Deteriorated EVAP hose or quick-connect fitting
Medium severityRubber lines near the tank harden and crack over time; a smoke test pinpoints the exact leak location.
Common causeParts:EVAP hose
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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.
Rather have a pro handle it? Find a vetted local mechanic.