P2DDAEVAP System Leak Detection Pump Performance/Stuck Off
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2DDA is stored when the leak detection pump fails to create the pressure change the leak test expects, as if it never started or moves too little air. GM performs this check on its electric leak check pumps (ELCP) under its own code P145C: at engine-off wake-ups between roughly 4.3 and 11 hours after shutdown the pump runs against a 0.020 in reference orifice, and if vacuum stays under 100 Pa after 60 s on the first measurement or 30 s on the second, the pump is judged stuck off; Type B, two trips. Mitsubishi's 2023 Outlander PHEV reports a pump stuck on or off under P24C0, after canister pressure falls too slowly. No manufacturer documents P2DDA publicly. The leak test cannot finish; the car drives normally. A pump running when told to stop is P2DDB.
- What you may notice
- Check engine light on
- Evaporative leak test never completes, readiness stays open
- Possible refuelling message or locked filler flap on some hybrids
- Likely causes
- LikelyPump motor or vane inside the leak check module seized or worn out
- PossibleFresh-air filter or vent line of the module blocked by dirt or water
- PossibleSwitching valve in the module not moving, so the pump works against the wrong path
- RareHose between module and canister split or off
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €120 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.