Evaporative Emission System Incorrect Purge Flow
The actual purge flow does not match the commanded value. Usually a purge valve stuck closed (no flow) or stuck open (too much flow at idle). Distinct from a leak code.
Affected components
- Evap purge valve
- Evap canister
- Evap hose
Common causes
- High likelihood: Purge valve stuck open or closed
- Medium likelihood: Purge hose kinked or restricted
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.