P0442 on a 2015 Honda Cr V

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 Honda Cr V

Ranked from 668 NHTSA owner complaints filed for this vehicle.

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1
Cracked or rodent-damaged fuel/EVAP line causing a raw fuel leak
High severity
Two owners in this batch had a mechanic find rodent-chewed fuel line (soy-based insulation) with visible leak points and a strong fuel odor -- a genuine leak that will set an EVAP fault.
Reported in 2 NHTSA complaints
Parts:fuel line
2
Leaking high-pressure fuel pump/fuel rail causing a fuel-smell leak
High severity
One owner reported a leaking HPFP with fuel smell inside the cabin; a raw-fuel leak of this kind can register as an EVAP leak in addition to its own fuel-system code.
Reported in 1 NHTSA complaint
Parts:fuel pump
3
Loose, worn, or improperly seated gas cap
Low severity
The single most common cause of a small EVAP leak code; always check/reseat or replace the cap before further diagnosis.
Common cause
Parts:fuel filler cap
4
Purge valve stuck open or leaking
Low severity
A purge valve that won't seal lets fresh air into the EVAP system during the leak test, mimicking a small leak.
Common cause
Parts:purge valve
5
Vent valve/canister vent solenoid stuck open
Low severity
If the vent valve fails to seal, the system can't hold vacuum/pressure during the self-test and sets a leak code.
Common cause
Parts:vent valve
6
Cracked or saturated charcoal (EVAP) canister
Low severity
A cracked canister housing is a common small-leak source, especially with age and road-salt exposure.
Common cause
Parts:charcoal canister
7
Rusted or corroded fuel filler neck
Medium severity
Corrosion around the filler neck seal area creates a slow leak path picked up by the EVAP monitor.
Common cause
Parts:fuel filler neck
8
Cracked EVAP hoses in the engine bay or under the vehicle
Low severity
Heat- and age-hardened rubber EVAP lines commonly crack at clamps or bends.
Common cause
Parts: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.

Matching symptoms

Check Engine Light