P0442 on Saturn
Evaporative Emission Control System Leak Detected (Small Leak)
P0442 on Saturn vehicles indicates evaporative emission control system leak detected (small leak). Au7o has documented this code across 1 Saturn model — most commonly on Aura. 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. Typical repair costs on Saturn range from $100 to $350, depending on the specific model and root cause.
Common Causes of P0442
- •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
P0442 on Saturn by Model
Saturn Aura(1 issue)
- EVAP Canister Purge Valve Failure (Check Engine Light)2007-2009
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.
Looking for P0442 on a different make?
View P0442 across all makes →Frequently Asked Questions
What does P0442 mean on 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 specifically, this code is documented across 1 model.
What causes P0442 on Saturn vehicles?▼
Common causes on Saturn: 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. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0442 on a Saturn?▼
Repair costs on Saturn range from $100 to $350, depending on the specific model and root cause.
Which Saturn models have P0442 documented?▼
Au7o has documented P0442 on 1 Saturn model: Aura.