P04EA

EVAP System Small Leak Detected - Fuel Tank Side

Severity

⚠️ Medium

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
Smell of gasoline in or around the car
Slight reduction in engine efficiency

Causes

Damage to the fuel tank
Leaky fuel line connections
EVAP purge valve malfunction
Damage to the fuel tank cap
Fuel tank pressure sensor malfunction

How to Fix

Check the tightness of the fuel tank cap
Inspect the fuel tank and connections for damage
Check the operation of the EVAP system purge valve
Perform a leak test on the EVAP system using a smoke generator
Replace damaged system components

Related codes

P0442 P0455 P0456