Question 1

What does P0442 mean?

Accepted Answer

P0442 - EVAP System Leak Detected (Small Leak). The EVAP system has detected a small vapor leak. Harder to find than large leaks.

Question 2

What are the symptoms of P0442?

Accepted Answer

Check engine light, No drivability symptoms

Question 3

What causes P0442?

Accepted Answer

Cracked gas cap seal, Cracked EVAP hose, Leaking purge valve, Leaking vent valve, Canister crack, Fuel filler neck crack

Question 4

How much does it cost to fix P0442?

Accepted Answer

Typical repair cost: $0-$400. Try new gas cap first ($10-25). If code returns, you need a smoke test.

P0442 — EVAP System Leak Detected (Small Leak)

Don't guess — diagnose P0442 the right way