P0442 on a 2017 Jeep Renegade

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 Jeep Renegade

Ranked from 560 NHTSA owner complaints filed for this vehicle.

Sort by:

1
EVAP leak at the fuel pump/sender assembly
Medium severity
Two owners of this exact vehicle had a dealer diagnostic confirm an EVAP leak traced to the fuel pump/sender assembly in the tank, in one case after the fuel-pump recall repair itself, with the technician reporting a gasoline smell near the tank.
Reported in 2 NHTSA complaints
Parts:fuel pump assembly
2
Vent valve restriction causing fuel-nozzle click-off
Medium severity
One owner reports the fuel nozzle clicking off every couple of seconds while fueling and failing a smog check — a pattern consistent with a restricted or stuck EVAP vent path.
Reported in 1 NHTSA complaint
Parts:vent valve
3
Loose or worn gas cap
Low severity
A cap that doesn't seal fully is the single most common source of a small EVAP leak.
Common cause
Parts:gas cap
4
Cracked or loose EVAP hose/line
Medium severity
A small split in a purge or vent line lets vapor escape or air in, tripping the small-leak monitor.
Common cause
5
Faulty purge valve
Medium severity
A purge valve that won't hold vacuum properly disrupts the EVAP system's leak-check monitor.
Common cause
Parts:purge valve
6
Cracked charcoal canister
Medium severity
A hairline crack in the canister housing is a common, hard-to-find small EVAP leak source.
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