P0442 on Saturn: How to Diagnose & Fix
Evaporative Emission Control System Leak Detected (Small Leak)
1 Saturn model · 1 documented issue · $100-$350 repair
P0442 on Saturn by model: symptoms, diagnosis and fix
Auras commonly throw EVAP emissions faults, most often from a stuck-open or failing canister purge solenoid/valve (and sometimes a clogged charcoal canister or faulty fuel-tank pressure sensor). The result is a persistent check engine light and potential emissions-test failure. The gas cap is worth checking first but is usually not the cause of the P0496 flow-during-non-purge code.
Common Symptoms
- Check engine light on
- Failed emissions/smog test
- Occasional rough idle
- Fuel odor in some cases
How to Fix
Confirm the gas cap is tight, inspect EVAP vacuum lines for cracks, then replace the canister purge solenoid/valve if it is stuck open. Replace the charcoal canister or fuel-tank pressure sensor if those are at fault.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- AM Autoparts AM-3296354606 vapor-canister purge solenoid
Confirm VIN/engine and connector.
- AM Autoparts AM-2568817646 vapor-canister purge solenoid
Confirm VIN/engine and connector.
- ACDelco 214-1946 vapor-canister purge valve
Confirm VIN/engine and current GM supersession.
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Sources for this issue (2)
P0442 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0442 mean on a Saturn?
P0442 stands for "Evaporative Emission Control System Leak Detected (Small Leak)." This emissions code means the evaporative emission (EVAP) control system has detected a small leak. The EVAP system seals the fuel tank and captures gasoline vapors, routing them to be burned in the engine instead of escaping into the air, and the computer periodically pressure- or vacuum-tests the system to confirm it's sealed. A small leak the size of about a 0.040-inch hole will set this code. By far the most common and cheapest cause is a loose, damaged, or missing gas cap, so that's the first thing to check, though any cracked hose or worn seal in the system can also trigger it. On Saturn it is documented across 1 model: Aura.
What are the most common causes of P0442?
The most common causes of P0442 are: Loose, damaged, or missing fuel filler cap, Worn or cracked gas cap seal, Cracked or disconnected EVAP hose or line, Faulty purge valve or vent valve, Damaged O-ring or seal at the fuel tank or filler neck, Small crack in the charcoal canister, Leaking fuel tank sending unit gasket. The specific cause varies by vehicle.
How much does it cost to fix P0442 on a Saturn?
Published repair estimates on Saturn range from $100 to $350 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P0442 on a different make?
View P0442 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.