OBD Guide

P04EA

EVAP System Small Leak Detected - Fuel Tank Side

P04EA is an OBD-II diagnostic trouble code meaning: EVAP System Small Leak Detected - Fuel Tank Side. Common causes: damage to the fuel tank, leaky fuel line connections. Estimated repair cost: $56–167.

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

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

Related codes

Error P04EA by Vehicle Brand

FAQ

What does the P04EA code mean?

P04EA is an OBD-II diagnostic trouble code that indicates: EVAP System Small Leak Detected - Fuel Tank Side

What causes a P04EA error code?

The most common causes of P04EA include: Damage to the fuel tank; Leaky fuel line connections; EVAP purge valve malfunction; Damage to the fuel tank cap.

How do I fix a P04EA diagnostic trouble code?

To fix P04EA: 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. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P04EA?

Do not drive — repair immediately

How much does it cost to fix P04EA?

The estimated repair cost for P04EA is $56–167. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat