P2DDE
Fuel Injection Quantity D Lower Than Expected
The measured fuel injection quantity for group D is below the calibrated window. Injector flow drift, rail pressure off, or measurement bias.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Injectors partially cloggedCommon
- Fuel rail pressure lowPossible
Parts involved
- Fuel Injector Group D
- Fuel Rail
- ECM
P2DDE 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.