P0442Low urgency
Evaporative Emission Control System Leak Detected (Small Leak)
Emission · EVAP System
✅ Not an emergency — vehicle is safe to drive. Check gas cap first.
What this means
A small evaporative emission leak has been detected. The most common cause is a loose or faulty gas cap — always check that first before booking a repair.
Likely causes
- Loose or faulty gas capMost common
- Cracked EVAP hose or purge valveCommon
- Faulty purge solenoidCommon
- Leaking fuel tank sealLess common
Estimated repair cost
Gas cap replacement$10 – $30
EVAP purge solenoid replace$80 – $200
EVAP line repair$100 – $300
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Frequently asked questions
What does P0442 mean?
A small evaporative emission leak has been detected. The most common cause is a loose or faulty gas cap — always check that first before booking a repair.
Is P0442 serious?
Not an emergency — vehicle is safe to drive. Check gas cap first.
How much does it cost to fix P0442?
Repair costs for P0442 range from $10 – $30 depending on the root cause and your vehicle.
Can I drive with P0442?
Yes, the vehicle is safe to drive. Schedule a repair at your convenience.