Evaporative Emission Control System Malfunction
A general fault in the evaporative emission (EVAP) system has been detected. The system seals the fuel tank and captures fuel vapour in a charcoal canister; this code indicates a failed leak test or sensor without identifying the specific failure.
Affected components
- Evap canister
- Evap purge valve
- Fuel filler cap
- Evap vent valve
Common causes
- High likelihood: Fuel filler cap loose or worn
- Medium likelihood: Purge valve stuck open or closed
- Medium likelihood: Cracked EVAP hose
Possible symptoms
- Check engine light on
- Possible smell of fuel near tank or engine bay
- Failed emissions inspection
- Loose-cap warning may appear
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.