P2DD9
EVAP System Leak Detection Pump Control Circuit Performance
The EVAP leak detection pump control circuit reports a performance condition. Pump response or current draw outside calibration.
- 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
- High-resistance contactPossible
Parts involved
- EVAP Leak Detection Pump
- Wiring Harness
- ECM
P2DD9 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.