P2DFD
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.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Symptoms
- Check engine light on
- Possible smell of fuel near tank or engine bay
- Failed emissions inspection
- Loose-cap warning may appear
Common causes
Ordered by how often each turns out to be the cause.
- Pump output degradedCommon
- Canister saturated with hydrocarbonsPossible
Parts involved
- EVAP Purge Pump
- EVAP Canister
P2DFD is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.