P04EF

EVAP System Very Small Leak Detected - Fresh Air Side

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$22–111 (est.)

Symptoms

Check Engine Light Is On
Slight increase in fuel consumption
Smell of fuel in the cabin

Causes

Damage to EVAP system hoses
Leaking fuel cap
Purge valve malfunction
Damage to the adsorber

How to Fix

Check the tightness of the fuel tank cap
Inspect the EVAP system hoses for damage.
Check the purge valve for functionality
Carry out diagnostics of the EVAP system at a service station

Related codes

P0440 P0442 P0455