P0442 on a 2017 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 2017 Ford Edge

Ranked from 1,300 NHTSA owner complaints filed for this vehicle.

Sort by:

1
EVAP purge valve/solenoid failure
High severity
Multiple owners of this exact vehicle report a failed EVAP canister purge valve/solenoid throwing code P1450, causing stalling and hard starts after refueling; several note Ford's service network is aware of the problem.
Reported in 5 NHTSA complaints
Parts:EVAP purge valve purge valve solenoid
2
Fuel filler neck housing leak
Medium severity
One owner's EVAP control system fault was traced to a leaking fuel filler neck housing.
Reported in 1 NHTSA complaint
Parts:fuel filler neck
3
Loose or damaged gas cap
Low severity
A worn or improperly seated cap is the classic first check for a small EVAP leak.
Common cause
Parts:gas cap
4
Cracked or aged EVAP vapor line/hose
Medium severity
Heat-cycled lines near the tank and canister crack over time.
Common cause
Parts:EVAP hose
5
EVAP vent valve failure
Medium severity
A vent valve that won't fully seal produces a small, persistent leak.
Common cause
Parts:EVAP vent valve
6
Charcoal canister crack
Low severity
A cracked canister housing will not hold vacuum during the self-test.
Common cause
Parts:charcoal canister

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