Loose fuel cap (very common); Cracked rubber line; Vent valve.

P0442

Q: What does P0442 mean?

EVAP small leak (~0.040"). A small leak in the evaporative emissions system.

WatchEvaporative emissions

EVAP small leak (~0.040")

A small leak in the evaporative emissions system.

Common causes

Loose fuel cap (very common)
Cracked rubber line
Vent valve

Can I keep driving?

Usually yes, but don't leave it. The car will drive, though ignoring it tends to turn a cheap fix into an expensive one.

Who fixes P0442

This one falls under Fault code diagnosis. Verified specialists can read it live over a remote session, usually in a few minutes — you only pay if it works.

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Full guide

P0442 Meaning: Small EVAP Leak ExplainedP0442 meaning: small EVAP system leak detected. Causes, fixes, and when to consult a specialist for car owners.

Related codes

These explanations are from a curated DTC knowledge base. Manufacturer-specific codes may need a specialist's hands-on read.

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