What does code P0442 mean on a Toyota and is it safe to drive?
P0442: Evaporative Emission System Leak Detected (Small Leak). Here's what it means on your Toyota, what usually causes it, what repairs typically cost, and how safe it is to keep driving.
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What this code means
The EVAP system has detected a small leak. Often caused by a loose or faulty gas cap or a small hose leak.
Common causes for your Toyota
- Loose, damaged, or wrong gas cap
- Cracked or disconnected EVAP hose
- Faulty purge or vent valve
- Leaking charcoal canister
Symptoms
- Check Engine Light
- Often no driveability issues
Typical fixes
- Tighten or replace gas cap
- Smoke test EVAP system
- Replace damaged hoses or valves
Repair cost range
For a Toyota, repairs for P0442 often fall between $15 and $300, depending on the cause and whether you use OEM or aftermarket parts. Labor rates vary by location.
Known issues on Toyota
P0442 on Toyota is most often caused by a loose or worn gas cap. If the cap is fine, the charcoal canister vent valve (VSV) and the EVAP purge valve are the next items to test on these models.
Most commonly affected models
Camry 2000–2011Corolla 2003–2013RAV4 2001–2012