P04EE
EVAP System Very Small Leak Detected Fuel Tank Side
Generic OBD-II
Common symptoms
What you'll notice
- Check the fuel cap for proper installation and tightness
- Inspect the EVAP system hoses for any cracks or leaks
- Test the purge solenoid valve for proper function
- Inspect the EVAP canister for any damage or leaks
- Perform a smoke test on the EVAP system to identify any hidden leaks
Common causes
Most likely first
- Loose or damaged fuel cap
- Leaking or disconnected EVAP system hoses
- Faulty EVAP canister purge valve
- Vent valve or canister malfunction
- Defective fuel tank pressure sensor
How to diagnose & fix
Work through it in order
- Check Engine Light (MIL) illuminates on the dashboard
- Increased emissions/smog during vehicle operation
- Difficulty starting the engine or rough idle
- Decreased fuel efficiency
- Strong smell of gasoline in or around the vehicle
Read & clear P04EE yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.