P2DDA
EVAP System Leak Detection Pump Performance/Stuck Off
The EVAP leak detection pump does not start when commanded. Motor seized, relay failure, or driver fault.
- 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 motor seizedCommon
- Pump relay failedPossible
- Carbon or debris buildup preventing free movementLess likely
Parts involved
- EVAP Leak Detection Pump
- Wiring Harness
- ECM
P2DDA 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.