P0442 on a 2015 Dodge Dart

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 Dart

Ranked from 510 NHTSA owner complaints filed for this vehicle.

Sort by:

1
Loose, worn, or misdiagnosed gas cap / fuel-cap-related EVAP fault
Low severity
One owner had the check-engine light traced to the fuel cap/EVAP system before a shop pointed to the fuel line.
Reported in 1 NHTSA complaint
Parts:fuel cap
2
Stuck-closed EVAP vent valve or restricted vent line
Medium severity
A vehicle that won't accept fuel at the pump (fuel clicks off after ~2 seconds) points to trapped tank pressure from a vent-side restriction rather than a cap problem.
Reported in 1 NHTSA complaint
Parts:EVAP vent valve
3
Purge valve stuck open
Medium severity
A leaking purge solenoid lets outside air into the EVAP system during the small-leak monitor.
Common cause
Parts:purge valve
4
Cracked or brittle EVAP hose/line
Medium severity
Age-related cracking in the small rubber/plastic EVAP lines is a very common small-leak source.
Common cause
5
Cracked charcoal canister
Medium severity
A hairline crack in the canister housing produces a small, persistent leak.
Common cause
Parts:charcoal canister
6
Rusted or damaged fuel filler neck
Medium severity
Corrosion can create a small leak path at the filler neck seam.
Common cause

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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