EVAP System Purge Pump Performance
The EVAP purge pump does not produce the expected flow during purge cycles. Pump aging, restricted line, or canister loaded.
Affected components
- Evap purge pump
- Evap canister
Common causes
- High likelihood: Pump output degraded
- Medium likelihood: Canister saturated with hydrocarbons
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.