P04EF
EVAP System Very Small Leak Detected - Fresh Air Side
P04EF is an OBD-II diagnostic trouble code meaning: EVAP System Very Small Leak Detected - Fresh Air Side. Common causes: damage to evap system hoses, leaking fuel cap. Estimated repair cost: $22–111.
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
Error P04EF by Vehicle Brand
FAQ
What does the P04EF code mean?
P04EF is an OBD-II diagnostic trouble code that indicates: EVAP System Very Small Leak Detected - Fresh Air Side
What causes a P04EF error code?
The most common causes of P04EF include: Damage to EVAP system hoses; Leaking fuel cap; Purge valve malfunction; Damage to the adsorber.
How do I fix a P04EF diagnostic trouble code?
To fix P04EF: Check the tightness of the fuel tank cap. Inspect the EVAP system hoses for damage.. Check the purge valve for functionality. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P04EF?
Limited driving only, diagnose soon
How much does it cost to fix P04EF?
The estimated repair cost for P04EF is $22–111. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat