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 in the fuel vapor recovery system. The most common cause is a loose or faulty gas cap — always check that first before booking a repair. The EVAP system prevents fuel vapors from escaping into the atmosphere.

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 in the fuel vapor recovery system. The most common cause is a loose or faulty gas cap — always check that first before booking a repair. The EVAP system prevents fuel vapors from escaping into the atmosphere.

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.